diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index b67a63c435..1338b744f4 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -42,7 +42,7 @@ jobs:
       - name: 🐍 Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: 3.11
 
       - name: 🐍 Install development dependencies
         run: |
diff --git a/.github/workflows/license_header.yml b/.github/workflows/license_header.yml
index 51b8172825..cf577e51c9 100644
--- a/.github/workflows/license_header.yml
+++ b/.github/workflows/license_header.yml
@@ -13,7 +13,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: 3.11
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 7a590a8214..0e41bf08b1 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -13,7 +13,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: 3.11
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
@@ -46,7 +46,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: 3.11
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
diff --git a/.github/workflows/worker.yml b/.github/workflows/worker.yml
index 4839670d62..bbaa285c78 100644
--- a/.github/workflows/worker.yml
+++ b/.github/workflows/worker.yml
@@ -18,7 +18,7 @@ jobs:
       - name: 🐍 Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: 3.11
 
       - name: 🐍 Install dependencies
         run: |
diff --git a/Dockerfile b/Dockerfile
index 3cdb34dd06..4004b4f70d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.8-slim-bullseye
+FROM python:3.11-slim-bullseye
 
 # RUN apt update && apt install -y procps gdb
 
@@ -16,10 +16,6 @@ COPY ./scripts /scripts
 COPY ./alembic /alembic
 COPY ./alembic.ini /alembic.ini
 
-RUN ./scripts/install-debug.sh
-
-RUN pip3 install --no-cache-dir --upgrade pip \
-    && pip3 install --no-cache-dir -r /conf/requirements.txt
-
+RUN pip3 install --no-cache-dir --upgrade pip && pip3 install --no-cache-dir -r /conf/requirements.txt
 
 ENTRYPOINT ["./scripts/start.sh"]
diff --git a/antarest/core/config.py b/antarest/core/config.py
index b88e4f44bb..0ff5082d54 100644
--- a/antarest/core/config.py
+++ b/antarest/core/config.py
@@ -13,7 +13,7 @@
 import multiprocessing
 import tempfile
 from dataclasses import asdict, dataclass, field
-from enum import Enum
+from enum import StrEnum
 from pathlib import Path
 from typing import Dict, List, Optional
 
@@ -25,7 +25,7 @@
 DEFAULT_WORKSPACE_NAME = "default"
 
 
-class Launcher(str, Enum):
+class Launcher(StrEnum):
     SLURM = "slurm"
     LOCAL = "local"
     DEFAULT = "default"
diff --git a/antarest/core/configdata/model.py b/antarest/core/configdata/model.py
index bd243387ec..3a4512e44c 100644
--- a/antarest/core/configdata/model.py
+++ b/antarest/core/configdata/model.py
@@ -10,7 +10,7 @@
 #
 # This file is part of the Antares project.
 
-from enum import Enum
+from enum import StrEnum
 from typing import Any, Optional
 
 from sqlalchemy import Column, Integer, String  # type: ignore
@@ -43,6 +43,6 @@ def to_dto(self) -> ConfigDataDTO:
 
 
 # APP MAIN CONFIG KEYS
-class ConfigDataAppKeys(str, Enum):
+class ConfigDataAppKeys(StrEnum):
     MAINTENANCE_MODE = "MAINTENANCE_MODE"
     MESSAGE_INFO = "MESSAGE_INFO"
diff --git a/antarest/core/interfaces/eventbus.py b/antarest/core/interfaces/eventbus.py
index c6e36a4b80..30771baff4 100644
--- a/antarest/core/interfaces/eventbus.py
+++ b/antarest/core/interfaces/eventbus.py
@@ -11,14 +11,14 @@
 # This file is part of the Antares project.
 
 from abc import ABC, abstractmethod
-from enum import Enum
+from enum import StrEnum
 from typing import Any, Awaitable, Callable, List, Optional
 
 from antarest.core.model import PermissionInfo
 from antarest.core.serialization import AntaresBaseModel
 
 
-class EventType(str, Enum):
+class EventType(StrEnum):
     ANY = "_ANY"
     STUDY_CREATED = "STUDY_CREATED"
     STUDY_DELETED = "STUDY_DELETED"
diff --git a/antarest/core/maintenance/model.py b/antarest/core/maintenance/model.py
index c133e4ea9f..c17beadbc3 100644
--- a/antarest/core/maintenance/model.py
+++ b/antarest/core/maintenance/model.py
@@ -10,10 +10,10 @@
 #
 # This file is part of the Antares project.
 
-from enum import Enum
+from enum import StrEnum
 
 
-class MaintenanceMode(str, Enum):
+class MaintenanceMode(StrEnum):
     NORMAL_MODE = "NORMAL"
     MAINTENANCE_MODE = "MAINTENANCE"
 
diff --git a/antarest/core/model.py b/antarest/core/model.py
index dd4ea511aa..78aa7a1e82 100644
--- a/antarest/core/model.py
+++ b/antarest/core/model.py
@@ -24,7 +24,7 @@
 SUB_JSON = Union[ELEMENT, JSON, List[Any], None]
 
 
-class PublicMode(str, enum.Enum):
+class PublicMode(enum.StrEnum):
     NONE = "NONE"
     READ = "READ"
     EXECUTE = "EXECUTE"
@@ -32,7 +32,7 @@ class PublicMode(str, enum.Enum):
     FULL = "FULL"
 
 
-class StudyPermissionType(str, enum.Enum):
+class StudyPermissionType(enum.StrEnum):
     """
     User permission belongs to Study
     """
diff --git a/antarest/core/tasks/model.py b/antarest/core/tasks/model.py
index 10f7ef0d34..7da1d201ad 100644
--- a/antarest/core/tasks/model.py
+++ b/antarest/core/tasks/model.py
@@ -13,7 +13,7 @@
 import typing as t
 import uuid
 from datetime import datetime
-from enum import Enum
+from enum import Enum, StrEnum
 
 from sqlalchemy import Boolean, Column, DateTime, ForeignKey, Integer, Sequence, String  # type: ignore
 from sqlalchemy.engine.base import Engine  # type: ignore
@@ -28,7 +28,7 @@
     from antarest.study.model import Study
 
 
-class TaskType(str, Enum):
+class TaskType(StrEnum):
     EXPORT = "EXPORT"
     VARIANT_GENERATION = "VARIANT_GENERATION"
     COPY = "COPY"
diff --git a/antarest/core/utils/archives.py b/antarest/core/utils/archives.py
index a128cd4438..2356653b78 100644
--- a/antarest/core/utils/archives.py
+++ b/antarest/core/utils/archives.py
@@ -15,7 +15,7 @@
 import tempfile
 import typing as t
 import zipfile
-from enum import Enum
+from enum import StrEnum
 from pathlib import Path
 
 import py7zr
@@ -25,7 +25,7 @@
 logger = logging.getLogger(__name__)
 
 
-class ArchiveFormat(str, Enum):
+class ArchiveFormat(StrEnum):
     ZIP = ".zip"
     SEVEN_ZIP = ".7z"
 
diff --git a/antarest/eventbus/web.py b/antarest/eventbus/web.py
index 7f7050a793..d2d9405235 100644
--- a/antarest/eventbus/web.py
+++ b/antarest/eventbus/web.py
@@ -12,7 +12,7 @@
 
 import dataclasses
 import logging
-from enum import Enum
+from enum import StrEnum
 from http import HTTPStatus
 from typing import List, Optional
 
@@ -32,7 +32,7 @@
 logger = logging.getLogger(__name__)
 
 
-class WebsocketMessageAction(str, Enum):
+class WebsocketMessageAction(StrEnum):
     SUBSCRIBE = "SUBSCRIBE"
     UNSUBSCRIBE = "UNSUBSCRIBE"
 
diff --git a/antarest/gui.py b/antarest/gui.py
index 4926e011af..86ddd5efd1 100644
--- a/antarest/gui.py
+++ b/antarest/gui.py
@@ -9,6 +9,18 @@
 # SPDX-License-Identifier: MPL-2.0
 #
 # This file is part of the Antares project.
+
+import os
+import sys
+
+# The Pyinstaller version we use has a known issue on windows and to fix it we need to implement this workaround.
+# See issue description and workaround on pyinstaller website:
+# https://pyinstaller.org/en/stable/common-issues-and-pitfalls.html#sys-stdin-sys-stdout-and-sys-stderr-in-noconsole-windowed-applications-windows-only
+if sys.stdout is None:
+    sys.stdout = open(os.devnull, "w")
+if sys.stderr is None:
+    sys.stderr = open(os.devnull, "w")
+
 import argparse
 import multiprocessing
 
diff --git a/antarest/launcher/adapters/abstractlauncher.py b/antarest/launcher/adapters/abstractlauncher.py
index 48f18e78e0..ac36176300 100644
--- a/antarest/launcher/adapters/abstractlauncher.py
+++ b/antarest/launcher/adapters/abstractlauncher.py
@@ -116,6 +116,6 @@ def update_log(log_line: str) -> None:
                         channel=EventChannelDirectory.JOB_STATUS + job_id,
                     )
                 )
-                self.cache.put(f"Launch_Progress_{job_id}", launch_progress_dto.model_dump())
+                self.cache.put(f"Launch_Progress_{job_id}", launch_progress_dto.model_dump(mode="json"))
 
         return update_log
diff --git a/antarest/launcher/model.py b/antarest/launcher/model.py
index d053a55c85..dbd90e3ef4 100644
--- a/antarest/launcher/model.py
+++ b/antarest/launcher/model.py
@@ -57,7 +57,7 @@ def from_launcher_params(cls, params: t.Optional[str]) -> "LauncherParametersDTO
         return cls.model_validate(from_json(params))
 
 
-class LogType(str, enum.Enum):
+class LogType(enum.StrEnum):
     STDOUT = "STDOUT"
     STDERR = "STDERR"
 
@@ -79,14 +79,14 @@ def to_suffix(self) -> str:
             return "out.log"
 
 
-class JobStatus(str, enum.Enum):
+class JobStatus(enum.StrEnum):
     PENDING = "pending"
     FAILED = "failed"
     SUCCESS = "success"
     RUNNING = "running"
 
 
-class JobLogType(str, enum.Enum):
+class JobLogType(enum.StrEnum):
     BEFORE = "BEFORE"
     AFTER = "AFTER"
 
@@ -139,7 +139,7 @@ def json_schema_extra(schema: t.MutableMapping[str, t.Any]) -> None:
                 exit_code=0,
                 solver_stats="time: 1651s, call_count: 1, optimization_issues: []",
                 owner=UserInfo(id=0o007, name="James BOND"),
-            ).model_dump()
+            ).model_dump(mode="json")
 
 
 class JobLog(Base):  # type: ignore
diff --git a/antarest/launcher/service.py b/antarest/launcher/service.py
index 573aaf3b9d..e5f78ede3f 100644
--- a/antarest/launcher/service.py
+++ b/antarest/launcher/service.py
@@ -185,7 +185,7 @@ def update(
                 self.event_bus.push(
                     Event(
                         type=EventType.STUDY_JOB_COMPLETED if final_status else EventType.STUDY_JOB_STATUS_UPDATE,
-                        payload=job_result.to_dto().model_dump(),
+                        payload=job_result.to_dto().model_dump(mode="json"),
                         permissions=PermissionInfo(public_mode=PublicMode.READ),
                         channel=EventChannelDirectory.JOB_STATUS + job_result.id,
                     )
diff --git a/antarest/matrixstore/service.py b/antarest/matrixstore/service.py
index 3a10ed09df..1d7bc27955 100644
--- a/antarest/matrixstore/service.py
+++ b/antarest/matrixstore/service.py
@@ -101,11 +101,7 @@ def get_matrix_id(self, matrix: t.Union[t.List[t.List[float]], str]) -> str:
         """
         # noinspection SpellCheckingInspection
         if isinstance(matrix, str):
-            # str.removeprefix() is not available in Python 3.8
-            prefix = "matrix://"
-            if matrix.startswith(prefix):
-                return matrix[len(prefix) :]
-            return matrix
+            return matrix.removeprefix("matrix://")
         elif isinstance(matrix, list):
             return self.create(matrix)
         else:
diff --git a/antarest/service_creator.py b/antarest/service_creator.py
index fa8086b789..3bee50cc45 100644
--- a/antarest/service_creator.py
+++ b/antarest/service_creator.py
@@ -12,7 +12,7 @@
 
 import logging
 import typing as t
-from enum import Enum
+from enum import StrEnum
 from pathlib import Path
 
 import redis
@@ -65,7 +65,7 @@
 """
 
 
-class Module(str, Enum):
+class Module(StrEnum):
     APP = "app"
     WATCHER = "watcher"
     MATRIX_GC = "matrix_gc"
diff --git a/antarest/study/business/aggregator_management.py b/antarest/study/business/aggregator_management.py
index a040faf1de..df5bbaa30b 100644
--- a/antarest/study/business/aggregator_management.py
+++ b/antarest/study/business/aggregator_management.py
@@ -12,7 +12,7 @@
 
 import logging
 import typing as t
-from enum import Enum
+from enum import StrEnum
 from pathlib import Path
 
 import numpy as np
@@ -54,19 +54,19 @@
 logger = logging.getLogger(__name__)
 
 
-class MCRoot(str, Enum):
+class MCRoot(StrEnum):
     MC_IND = "mc-ind"
     MC_ALL = "mc-all"
 
 
-class MCIndAreasQueryFile(str, Enum):
+class MCIndAreasQueryFile(StrEnum):
     VALUES = "values"
     DETAILS = "details"
     DETAILS_ST_STORAGE = "details-STstorage"
     DETAILS_RES = "details-res"
 
 
-class MCAllAreasQueryFile(str, Enum):
+class MCAllAreasQueryFile(StrEnum):
     VALUES = "values"
     DETAILS = "details"
     DETAILS_ST_STORAGE = "details-STstorage"
@@ -74,11 +74,11 @@ class MCAllAreasQueryFile(str, Enum):
     ID = "id"
 
 
-class MCIndLinksQueryFile(str, Enum):
+class MCIndLinksQueryFile(StrEnum):
     VALUES = "values"
 
 
-class MCAllLinksQueryFile(str, Enum):
+class MCAllLinksQueryFile(StrEnum):
     VALUES = "values"
     ID = "id"
 
@@ -308,7 +308,7 @@ def _process_df(self, file_path: Path, is_details: bool) -> pd.DataFrame:
             # loop over the cluster id to extract the values of the actual columns
             for cluster_id, dummy_component in cluster_dummy_product_cols:
                 for actual_col in actual_cols:
-                    col_values = un_normalized_df[(cluster_id, actual_col, dummy_component)].tolist()  # type: ignore
+                    col_values = un_normalized_df[(cluster_id, actual_col, dummy_component)].tolist()
                     new_obj[actual_col] += col_values
                 new_obj[CLUSTER_ID_COL] += [cluster_id for _ in range(df_len)]
                 new_obj[TIME_ID_COL] += list(range(1, df_len + 1))
diff --git a/antarest/study/business/area_management.py b/antarest/study/business/area_management.py
index 9712a3daba..d90ec4c554 100644
--- a/antarest/study/business/area_management.py
+++ b/antarest/study/business/area_management.py
@@ -229,11 +229,11 @@ def from_model(
         obj = {
             "average_unsupplied_energy_cost": average_unsupplied_energy_cost,
             "average_spilled_energy_cost": average_spilled_energy_cost,
-            **area_folder.optimization.filtering.model_dump(by_alias=False),
-            **area_folder.optimization.nodal_optimization.model_dump(by_alias=False),
+            **area_folder.optimization.filtering.model_dump(mode="json", by_alias=False),
+            **area_folder.optimization.nodal_optimization.model_dump(mode="json", by_alias=False),
             # adequacy_patch is only available if study version >= 830.
             **(
-                area_folder.adequacy_patch.adequacy_patch.model_dump(by_alias=False)
+                area_folder.adequacy_patch.adequacy_patch.model_dump(mode="json", by_alias=False)
                 if area_folder.adequacy_patch
                 else {}
             ),
@@ -363,7 +363,7 @@ def update_areas_props(
         for area_id, update_area in update_areas_by_ids.items():
             # Update the area properties.
             old_area = old_areas_by_ids[area_id]
-            new_area = old_area.copy(update=update_area.model_dump(by_alias=False, exclude_none=True))
+            new_area = old_area.copy(update=update_area.model_dump(mode="json", by_alias=False, exclude_none=True))
             new_areas_by_ids[area_id] = new_area
 
             # Convert the DTO to a configuration object and update the configuration file.
diff --git a/antarest/study/business/areas/renewable_management.py b/antarest/study/business/areas/renewable_management.py
index f102c6a251..b093aa325f 100644
--- a/antarest/study/business/areas/renewable_management.py
+++ b/antarest/study/business/areas/renewable_management.py
@@ -65,7 +65,7 @@ def json_schema_extra(schema: t.MutableMapping[str, t.Any]) -> None:
                 unit_count=100,
                 nominal_capacity=1000.0,
                 ts_interpretation="power-generation",
-            ).model_dump()
+            ).model_dump(mode="json")
 
 
 class RenewableClusterCreation(RenewableClusterInput):
diff --git a/antarest/study/business/areas/st_storage_management.py b/antarest/study/business/areas/st_storage_management.py
index 7592d50423..8c1a197861 100644
--- a/antarest/study/business/areas/st_storage_management.py
+++ b/antarest/study/business/areas/st_storage_management.py
@@ -68,7 +68,7 @@ def json_schema_extra(schema: t.MutableMapping[str, t.Any]) -> None:
                 efficiency=0.94,
                 initial_level=0.5,
                 initial_level_optim=True,
-            ).model_dump()
+            ).model_dump(mode="json")
 
 
 class STStorageCreation(STStorageInput):
@@ -88,7 +88,7 @@ def validate_name(cls, name: t.Optional[str]) -> str:
 
     # noinspection PyUnusedLocal
     def to_config(self, study_version: StudyVersion) -> STStorageConfigType:
-        values = self.model_dump(by_alias=False, exclude_none=True)
+        values = self.model_dump(mode="json", by_alias=False, exclude_none=True)
         return create_st_storage_config(study_version=study_version, **values)
 
 
@@ -111,7 +111,7 @@ def json_schema_extra(schema: t.MutableMapping[str, t.Any]) -> None:
                 reservoir_capacity=600,
                 efficiency=0.94,
                 initial_level_optim=True,
-            ).model_dump()
+            ).model_dump(mode="json")
 
 
 # =============
@@ -246,7 +246,7 @@ def create_storage_output(
     config: t.Mapping[str, t.Any],
 ) -> "STStorageOutput":
     obj = create_st_storage_config(study_version=study_version, **config, id=cluster_id)
-    kwargs = obj.model_dump(by_alias=False)
+    kwargs = obj.model_dump(mode="json", by_alias=False)
     return STStorageOutput(**kwargs)
 
 
@@ -390,12 +390,15 @@ def update_storages_props(
             for storage_id, update_cluster in update_storages_by_ids.items():
                 # Update the storage cluster properties.
                 old_cluster = old_storages_by_ids[storage_id]
-                new_cluster = old_cluster.copy(update=update_cluster.model_dump(by_alias=False, exclude_none=True))
+                new_cluster = old_cluster.copy(
+                    update=update_cluster.model_dump(mode="json", by_alias=False, exclude_none=True)
+                )
                 new_storages_by_areas[area_id][storage_id] = new_cluster
 
                 # Convert the DTO to a configuration object and update the configuration file.
                 properties = create_st_storage_config(
-                    StudyVersion.parse(study.version), **new_cluster.model_dump(by_alias=False, exclude_none=True)
+                    StudyVersion.parse(study.version),
+                    **new_cluster.model_dump(mode="json", by_alias=False, exclude_none=True),
                 )
                 path = _STORAGE_LIST_PATH.format(area_id=area_id, storage_id=storage_id)
                 cmd = UpdateConfig(
@@ -469,7 +472,7 @@ def update_storage(
         old_config = create_st_storage_config(study_version, **values)
 
         # use Python values to synchronize Config and Form values
-        new_values = form.model_dump(by_alias=False, exclude_none=True)
+        new_values = form.model_dump(mode="json", by_alias=False, exclude_none=True)
         new_config = old_config.copy(exclude={"id"}, update=new_values)
         new_data = new_config.model_dump(mode="json", by_alias=True, exclude={"id"})
 
@@ -489,7 +492,7 @@ def update_storage(
         ]
         execute_or_add_commands(study, file_study, commands, self.storage_service)
 
-        values = new_config.model_dump(by_alias=False)
+        values = new_config.model_dump(mode="json", by_alias=False)
         return STStorageOutput(**values, id=storage_id)
 
     def delete_storages(
@@ -552,7 +555,9 @@ def duplicate_cluster(self, study: Study, area_id: str, source_id: str, new_clus
         study_version = StudyVersion.parse(study.version)
         if study_version < STUDY_VERSION_8_8:
             fields_to_exclude.add("enabled")
-        creation_form = STStorageCreation(**current_cluster.model_dump(by_alias=False, exclude=fields_to_exclude))
+        creation_form = STStorageCreation(
+            **current_cluster.model_dump(mode="json", by_alias=False, exclude=fields_to_exclude)
+        )
 
         new_config = creation_form.to_config(study_version)
         create_cluster_cmd = self._make_create_cluster_cmd(area_id, new_config)
@@ -581,7 +586,7 @@ def duplicate_cluster(self, study: Study, area_id: str, source_id: str, new_clus
 
         execute_or_add_commands(study, self._get_file_study(study), commands, self.storage_service)
 
-        return STStorageOutput(**new_config.model_dump(by_alias=False))
+        return STStorageOutput(**new_config.model_dump(mode="json", by_alias=False))
 
     def get_matrix(
         self,
diff --git a/antarest/study/business/areas/thermal_management.py b/antarest/study/business/areas/thermal_management.py
index d9679355fd..2786617cc1 100644
--- a/antarest/study/business/areas/thermal_management.py
+++ b/antarest/study/business/areas/thermal_management.py
@@ -72,7 +72,7 @@ def json_schema_extra(schema: t.MutableMapping[str, t.Any]) -> None:
                 nominal_capacity=1000.0,
                 gen_ts="use global",
                 co2=7.0,
-            ).model_dump()
+            ).model_dump(mode="json")
 
 
 @camel_case_model
@@ -92,7 +92,7 @@ def validate_name(cls, name: t.Optional[str]) -> str:
         return name
 
     def to_config(self, study_version: StudyVersion) -> ThermalConfigType:
-        values = self.model_dump(by_alias=False, exclude_none=True)
+        values = self.model_dump(mode="json", by_alias=False, exclude_none=True)
         return create_thermal_config(study_version=study_version, **values)
 
 
@@ -115,7 +115,7 @@ def json_schema_extra(schema: t.MutableMapping[str, t.Any]) -> None:
                 nominal_capacity=1000.0,
                 gen_ts="use global",
                 co2=7.0,
-            ).model_dump()
+            ).model_dump(mode="json")
 
 
 def create_thermal_output(
@@ -124,7 +124,7 @@ def create_thermal_output(
     config: t.Mapping[str, t.Any],
 ) -> "ThermalClusterOutput":
     obj = create_thermal_config(study_version=study_version, **config, id=cluster_id)
-    kwargs = obj.model_dump(by_alias=False)
+    kwargs = obj.model_dump(mode="json", by_alias=False)
     return ThermalClusterOutput(**kwargs)
 
 
@@ -255,12 +255,15 @@ def update_thermals_props(
             for thermal_id, update_cluster in update_thermals_by_ids.items():
                 # Update the thermal cluster properties.
                 old_cluster = old_thermals_by_ids[thermal_id]
-                new_cluster = old_cluster.copy(update=update_cluster.model_dump(by_alias=False, exclude_none=True))
+                new_cluster = old_cluster.copy(
+                    update=update_cluster.model_dump(mode="json", by_alias=False, exclude_none=True)
+                )
                 new_thermals_by_areas[area_id][thermal_id] = new_cluster
 
                 # Convert the DTO to a configuration object and update the configuration file.
                 properties = create_thermal_config(
-                    StudyVersion.parse(study.version), **new_cluster.model_dump(by_alias=False, exclude_none=True)
+                    StudyVersion.parse(study.version),
+                    **new_cluster.model_dump(mode="json", by_alias=False, exclude_none=True),
                 )
                 path = _CLUSTER_PATH.format(area_id=area_id, cluster_id=thermal_id)
                 cmd = UpdateConfig(
@@ -352,7 +355,7 @@ def update_cluster(
             old_config = create_thermal_config(study_version, **values)
 
         # Use Python values to synchronize Config and Form values
-        new_values = cluster_data.model_dump(by_alias=False, exclude_none=True)
+        new_values = cluster_data.model_dump(mode="json", by_alias=False, exclude_none=True)
         new_config = old_config.copy(exclude={"id"}, update=new_values)
         new_data = new_config.model_dump(mode="json", by_alias=True, exclude={"id"})
 
@@ -424,7 +427,7 @@ def duplicate_cluster(
         # Cluster duplication
         source_cluster = self.get_cluster(study, area_id, source_id)
         source_cluster.name = new_cluster_name
-        creation_form = ThermalClusterCreation(**source_cluster.model_dump(by_alias=False, exclude={"id"}))
+        creation_form = ThermalClusterCreation(**source_cluster.model_dump(mode="json", by_alias=False, exclude={"id"}))
         new_config = creation_form.to_config(StudyVersion.parse(study.version))
         create_cluster_cmd = self._make_create_cluster_cmd(area_id, new_config)
 
@@ -457,7 +460,7 @@ def duplicate_cluster(
 
         execute_or_add_commands(study, self._get_file_study(study), commands, self.storage_service)
 
-        return ThermalClusterOutput(**new_config.model_dump(by_alias=False))
+        return ThermalClusterOutput(**new_config.model_dump(mode="json", by_alias=False))
 
     def validate_series(self, study: Study, area_id: str, cluster_id: str) -> bool:
         lower_cluster_id = cluster_id.lower()
diff --git a/antarest/study/business/enum_ignore_case.py b/antarest/study/business/enum_ignore_case.py
index 2259d229f7..9d0bcf3396 100644
--- a/antarest/study/business/enum_ignore_case.py
+++ b/antarest/study/business/enum_ignore_case.py
@@ -14,7 +14,7 @@
 import typing
 
 
-class EnumIgnoreCase(str, enum.Enum):
+class EnumIgnoreCase(enum.StrEnum):
     """
     Case-insensitive enum base class
 
diff --git a/antarest/study/business/link_management.py b/antarest/study/business/link_management.py
index f14c43ef07..54831ad8ac 100644
--- a/antarest/study/business/link_management.py
+++ b/antarest/study/business/link_management.py
@@ -121,7 +121,7 @@ def get_all_links_props(self, study: RawStudy) -> t.Mapping[t.Tuple[str, str], L
             for area2_id, properties_cfg in property_map.items():
                 area1_id, area2_id = sorted([area1_id, area2_id])
                 properties = LinkProperties(**properties_cfg)
-                links_by_ids[(area1_id, area2_id)] = LinkOutput(**properties.model_dump(by_alias=False))
+                links_by_ids[(area1_id, area2_id)] = LinkOutput(**properties.model_dump(mode="json", by_alias=False))
 
         return links_by_ids
 
@@ -137,7 +137,9 @@ def update_links_props(
         for (area1, area2), update_link_dto in update_links_by_ids.items():
             # Update the link properties.
             old_link_dto = old_links_by_ids[(area1, area2)]
-            new_link_dto = old_link_dto.copy(update=update_link_dto.model_dump(by_alias=False, exclude_none=True))
+            new_link_dto = old_link_dto.copy(
+                update=update_link_dto.model_dump(mode="json", by_alias=False, exclude_none=True)
+            )
             new_links_by_ids[(area1, area2)] = new_link_dto
 
             # Convert the DTO to a configuration object and update the configuration file.
diff --git a/antarest/study/business/scenario_builder_management.py b/antarest/study/business/scenario_builder_management.py
index c8a38b28c3..ac5a6a2bb6 100644
--- a/antarest/study/business/scenario_builder_management.py
+++ b/antarest/study/business/scenario_builder_management.py
@@ -37,7 +37,7 @@
 Rulesets: te.TypeAlias = t.MutableMapping[str, Ruleset]
 
 
-class ScenarioType(str, enum.Enum):
+class ScenarioType(enum.StrEnum):
     """
     Scenario type
 
diff --git a/antarest/study/business/table_mode_management.py b/antarest/study/business/table_mode_management.py
index 342c1c5abb..b108c57cb8 100644
--- a/antarest/study/business/table_mode_management.py
+++ b/antarest/study/business/table_mode_management.py
@@ -95,11 +95,11 @@ def __init__(
     def _get_table_data_unsafe(self, study: RawStudy, table_type: TableModeType) -> TableDataDTO:
         if table_type == TableModeType.AREA:
             areas_map = self._area_manager.get_all_area_props(study)
-            data = {area_id: area.model_dump(by_alias=True) for area_id, area in areas_map.items()}
+            data = {area_id: area.model_dump(mode="json", by_alias=True) for area_id, area in areas_map.items()}
         elif table_type == TableModeType.LINK:
             links_map = self._link_manager.get_all_links_props(study)
             data = {
-                f"{area1_id} / {area2_id}": link.model_dump(by_alias=True)
+                f"{area1_id} / {area2_id}": link.model_dump(mode="json", by_alias=True)
                 for (area1_id, area2_id), link in links_map.items()
             }
         elif table_type == TableModeType.THERMAL:
diff --git a/antarest/study/business/thematic_trimming_management.py b/antarest/study/business/thematic_trimming_management.py
index 96fd8aa106..d0ada30b65 100644
--- a/antarest/study/business/thematic_trimming_management.py
+++ b/antarest/study/business/thematic_trimming_management.py
@@ -51,7 +51,7 @@ def set_field_values(self, study: Study, field_values: ThematicTrimmingFormField
         Set Thematic Trimming config from the webapp form
         """
         file_study = self.storage_service.get_storage(study).get_raw(study)
-        field_values_dict = field_values.model_dump()
+        field_values_dict = field_values.model_dump(mode="json")
 
         keys_by_bool: t.Dict[bool, t.List[t.Any]] = {True: [], False: []}
         fields_info = get_fields_info(StudyVersion.parse(study.version))
diff --git a/antarest/study/business/timeseries_config_management.py b/antarest/study/business/timeseries_config_management.py
index da28a5e468..8b01bfe24e 100644
--- a/antarest/study/business/timeseries_config_management.py
+++ b/antarest/study/business/timeseries_config_management.py
@@ -133,7 +133,7 @@ def __set_field_values_for_type(
         field_values: TSFormFieldsForType,
     ) -> None:
         commands: t.List[UpdateConfig] = []
-        values = field_values.model_dump()
+        values = field_values.model_dump(mode="json")
 
         for field, path in PATH_BY_TS_STR_FIELD.items():
             field_val = values[field]
diff --git a/antarest/study/business/xpansion_management.py b/antarest/study/business/xpansion_management.py
index 318adde367..02e1fc795c 100644
--- a/antarest/study/business/xpansion_management.py
+++ b/antarest/study/business/xpansion_management.py
@@ -342,10 +342,12 @@ def create_xpansion_configuration(self, study: Study, zipped_config: t.Optional[
 
             xpansion_settings = XpansionSettings()
             settings_obj = xpansion_settings.model_dump(
-                by_alias=True, exclude_none=True, exclude={"sensitivity_config"}
+                mode="json", by_alias=True, exclude_none=True, exclude={"sensitivity_config"}
             )
             if xpansion_settings.sensitivity_config:
-                sensitivity_obj = xpansion_settings.sensitivity_config.model_dump(by_alias=True, exclude_none=True)
+                sensitivity_obj = xpansion_settings.sensitivity_config.model_dump(
+                    mode="json", by_alias=True, exclude_none=True
+                )
             else:
                 sensitivity_obj = {}
 
@@ -386,7 +388,7 @@ def update_xpansion_settings(
 
         actual_settings = self.get_xpansion_settings(study)
         settings_fields = new_xpansion_settings.model_dump(
-            by_alias=False, exclude_none=True, exclude={"sensitivity_config"}
+            mode="json", by_alias=False, exclude_none=True, exclude={"sensitivity_config"}
         )
         updated_settings = actual_settings.copy(deep=True, update=settings_fields)
 
@@ -407,11 +409,11 @@ def update_xpansion_settings(
                 msg = f"Additional constraints file '{constraints_file}' does not exist"
                 raise XpansionFileNotFoundError(msg) from None
 
-        config_obj = updated_settings.model_dump(by_alias=True, exclude={"sensitivity_config"})
+        config_obj = updated_settings.model_dump(mode="json", by_alias=True, exclude={"sensitivity_config"})
         file_study.tree.save(config_obj, ["user", "expansion", "settings"])
 
         if new_xpansion_settings.sensitivity_config:
-            sensitivity_obj = new_xpansion_settings.sensitivity_config.model_dump(by_alias=True)
+            sensitivity_obj = new_xpansion_settings.sensitivity_config.model_dump(mode="json", by_alias=True)
             file_study.tree.save(sensitivity_obj, ["user", "expansion", "sensitivity", "sensitivity_in"])
 
         return self.get_xpansion_settings(study)
@@ -551,7 +553,7 @@ def add_candidate(self, study: Study, xpansion_candidate: XpansionCandidateDTO)
         )  # The primary key is actually the name, the id does not matter and is never checked.
 
         logger.info(f"Adding candidate '{xpansion_candidate.name}' to study '{study.id}'")
-        candidates_obj[next_id] = xpansion_candidate.model_dump(by_alias=True, exclude_none=True)
+        candidates_obj[next_id] = xpansion_candidate.model_dump(mode="json", by_alias=True, exclude_none=True)
         candidates_data = {"user": {"expansion": {"candidates": candidates_obj}}}
         file_study.tree.save(candidates_data)
         # Should we add a field in the study config containing the xpansion candidates like the links or the areas ?
@@ -592,7 +594,9 @@ def update_candidate(
         for candidate_id, candidate in candidates.items():
             if candidate["name"] == candidate_name:
                 logger.info(f"Updating candidate '{candidate_name}' of study '{study.id}'")
-                candidates[candidate_id] = xpansion_candidate_dto.model_dump(by_alias=True, exclude_none=True)
+                candidates[candidate_id] = xpansion_candidate_dto.model_dump(
+                    mode="json", by_alias=True, exclude_none=True
+                )
                 file_study.tree.save(candidates, ["user", "expansion", "candidates"])
                 return
         raise CandidateNotFoundError(f"The candidate '{xpansion_candidate_dto.name}' does not exist")
diff --git a/antarest/study/model.py b/antarest/study/model.py
index 2308c99f99..e511185c25 100644
--- a/antarest/study/model.py
+++ b/antarest/study/model.py
@@ -437,13 +437,13 @@ class StudySimResultDTO(AntaresBaseModel):
     archived: bool
 
 
-class StudyDownloadType(str, enum.Enum):
+class StudyDownloadType(enum.StrEnum):
     LINK = "LINK"
     DISTRICT = "DISTRICT"
     AREA = "AREA"
 
 
-class StudyDownloadLevelDTO(str, enum.Enum):
+class StudyDownloadLevelDTO(enum.StrEnum):
     ANNUAL = "annual"
     MONTHLY = "monthly"
     WEEKLY = "weekly"
@@ -468,7 +468,7 @@ def inc_date(self, date: datetime) -> datetime:
             raise ShouldNotHappenException()
 
 
-class ExportFormat(str, enum.Enum):
+class ExportFormat(enum.StrEnum):
     ZIP = "application/zip"
     TAR_GZ = "application/tar+gz"
     JSON = "application/json"
diff --git a/antarest/study/repository.py b/antarest/study/repository.py
index a485b24652..6ecad45df7 100644
--- a/antarest/study/repository.py
+++ b/antarest/study/repository.py
@@ -119,7 +119,7 @@ class StudyFilter(AntaresBaseModel, frozen=True, extra="forbid"):
     access_permissions: AccessPermissions = AccessPermissions()
 
 
-class StudySortBy(str, enum.Enum):
+class StudySortBy(enum.StrEnum):
     """How to sort the results of studies query results"""
 
     NAME_ASC = "+name"
diff --git a/antarest/study/service.py b/antarest/study/service.py
index 4f86bdd781..1d1c2be1c6 100644
--- a/antarest/study/service.py
+++ b/antarest/study/service.py
@@ -1347,7 +1347,7 @@ def export_task(_notifier: TaskUpdateNotifier) -> TaskResult:
                 return FileResponse(tmp_export_file, headers=headers, media_type=filetype)
 
             else:
-                json_response = to_json(matrix.model_dump())
+                json_response = to_json(matrix.model_dump(mode="json"))
                 return Response(content=json_response, media_type="application/json")
 
     def get_study_sim_result(self, study_id: str, params: RequestParameters) -> t.List[StudySimResultDTO]:
@@ -2457,7 +2457,7 @@ def unarchive_output_task(
                     src=str(src),
                     dest=str(dest),
                     remove_src=not keep_src_zip,
-                ).model_dump(),
+                ).model_dump(mode="json"),
                 name=task_name,
                 ref_id=study.id,
                 request_params=params,
diff --git a/antarest/study/storage/rawstudy/model/filesystem/config/ruleset_matrices.py b/antarest/study/storage/rawstudy/model/filesystem/config/ruleset_matrices.py
index 29da19c30e..6ed47a3e17 100644
--- a/antarest/study/storage/rawstudy/model/filesystem/config/ruleset_matrices.py
+++ b/antarest/study/storage/rawstudy/model/filesystem/config/ruleset_matrices.py
@@ -397,11 +397,11 @@ def update_table_form(self, table_form: TableForm, scenario_type: str, *, nan_va
         scenario = self.scenarios[scenario_type]
         if isinstance(scenario, pd.DataFrame):
             simple_table_form = t.cast(SimpleTableForm, table_form)
-            df = pd.DataFrame(simple_table_form).transpose().replace([None, nan_value], np.nan)
-            scenario.at[df.index, df.columns] = df
+            df = pd.DataFrame.from_dict(simple_table_form, orient="index").replace([None, nan_value], np.nan)
+            scenario.loc[df.index, df.columns] = df
         else:
             cluster_table_form = t.cast(ClusterTableForm, table_form)
             for area, simple_table_form in cluster_table_form.items():
                 scenario = t.cast(pd.DataFrame, self.scenarios[scenario_type][area])
                 df = pd.DataFrame(simple_table_form).transpose().replace([None, nan_value], np.nan)
-                scenario.at[df.index, df.columns] = df
+                scenario.loc[df.index, df.columns] = df
diff --git a/antarest/study/storage/rawstudy/model/filesystem/matrix/date_serializer.py b/antarest/study/storage/rawstudy/model/filesystem/matrix/date_serializer.py
index cdc67b8ac5..2b8c431085 100644
--- a/antarest/study/storage/rawstudy/model/filesystem/matrix/date_serializer.py
+++ b/antarest/study/storage/rawstudy/model/filesystem/matrix/date_serializer.py
@@ -10,6 +10,8 @@
 #
 # This file is part of the Antares project.
 
+from __future__ import annotations
+
 import re
 from abc import ABC, abstractmethod
 from typing import Hashable, List, Sequence, Tuple, cast
@@ -43,7 +45,7 @@ def __init__(self, area: str):
         self.area = area
 
     @abstractmethod
-    def extract_date(self, df: pd.DataFrame) -> Tuple[pd.Index, pd.DataFrame]:
+    def extract_date(self, df: pd.DataFrame) -> Tuple[pd.Index[str], pd.DataFrame]:
         """
         Extract date from raw columns inside matrix file
         Args:
@@ -54,7 +56,7 @@ def extract_date(self, df: pd.DataFrame) -> Tuple[pd.Index, pd.DataFrame]:
         raise NotImplementedError()
 
     @abstractmethod
-    def build_date(self, index: pd.Index) -> pd.DataFrame:
+    def build_date(self, index: pd.Index[str]) -> pd.DataFrame:
         """
         Format in antares style date index
         Args:
@@ -78,7 +80,7 @@ class HourlyMatrixSerializer(IDateMatrixSerializer):
     Class implementation for hourly index
     """
 
-    def build_date(self, index: pd.Index) -> pd.DataFrame:
+    def build_date(self, index: pd.Index[str]) -> pd.DataFrame:
         def _map(row: str) -> Tuple[str, int, str, str, str]:
             m, d, h = re.split(r"[\s/]", row)
             return "", 1, d, IDateMatrixSerializer._R_MONTHS[m], h
@@ -97,7 +99,7 @@ def _map(row: str) -> Tuple[str, int, str, str, str]:
 
         return pd.concat([headers, matrix], axis=0)
 
-    def extract_date(self, df: pd.DataFrame) -> Tuple[pd.Index, pd.DataFrame]:
+    def extract_date(self, df: pd.DataFrame) -> Tuple[pd.Index[str], pd.DataFrame]:
         # Extract left part with date
         df_date = df.iloc[:, 2:5]
         df_date.columns = pd.Index(data=["day", "month", "hour"])
@@ -108,7 +110,7 @@ def extract_date(self, df: pd.DataFrame) -> Tuple[pd.Index, pd.DataFrame]:
         to_remove = cast(Sequence[Hashable], df.columns[0:5])
         body = df.drop(to_remove, axis=1)
 
-        return pd.Index(date), body
+        return pd.Index(date), body  # type: ignore
 
 
 class DailyMatrixSerializer(IDateMatrixSerializer):
@@ -116,7 +118,7 @@ class DailyMatrixSerializer(IDateMatrixSerializer):
     Class implementation for daily index
     """
 
-    def build_date(self, index: pd.Index) -> pd.DataFrame:
+    def build_date(self, index: pd.Index[str]) -> pd.DataFrame:
         def _map(row: str) -> Tuple[str, int, str, str]:
             m, d = row.split("/")
             return "", 1, d, IDateMatrixSerializer._R_MONTHS[m]
@@ -135,7 +137,7 @@ def _map(row: str) -> Tuple[str, int, str, str]:
 
         return pd.concat([headers, matrix], axis=0)
 
-    def extract_date(self, df: pd.DataFrame) -> Tuple[pd.Index, pd.DataFrame]:
+    def extract_date(self, df: pd.DataFrame) -> Tuple[pd.Index[str], pd.DataFrame]:
         # Extract left part with date
         df_date = df.iloc[:, 2:4]
         df_date.columns = pd.Index(["day", "month"])
@@ -146,7 +148,7 @@ def extract_date(self, df: pd.DataFrame) -> Tuple[pd.Index, pd.DataFrame]:
         to_remove = cast(Sequence[Hashable], df.columns[0:4])
         body = df.drop(to_remove, axis=1)
 
-        return pd.Index(date), body
+        return pd.Index(date), body  # type: ignore
 
 
 class WeeklyMatrixSerializer(IDateMatrixSerializer):
@@ -154,7 +156,7 @@ class WeeklyMatrixSerializer(IDateMatrixSerializer):
     Class implementation for weekly index
     """
 
-    def build_date(self, index: pd.Index) -> pd.DataFrame:
+    def build_date(self, index: pd.Index[str]) -> pd.DataFrame:
         matrix = pd.DataFrame({0: [""] * index.size, 1: index.values})
 
         headers = pd.DataFrame(
@@ -167,7 +169,7 @@ def build_date(self, index: pd.Index) -> pd.DataFrame:
 
         return pd.concat([headers, matrix], axis=0)
 
-    def extract_date(self, df: pd.DataFrame) -> Tuple[pd.Index, pd.DataFrame]:
+    def extract_date(self, df: pd.DataFrame) -> Tuple[pd.Index[str], pd.DataFrame]:
         # Extract left part with date
         df_date = df.iloc[:, 1:2]
         df_date.columns = pd.Index(["weekly"])
@@ -184,7 +186,7 @@ class MonthlyMatrixSerializer(IDateMatrixSerializer):
     Class implementation for monthly index
     """
 
-    def build_date(self, index: pd.Index) -> pd.DataFrame:
+    def build_date(self, index: pd.Index[str]) -> pd.DataFrame:
         matrix = pd.DataFrame(
             {
                 0: [""] * index.size,
@@ -203,7 +205,7 @@ def build_date(self, index: pd.Index) -> pd.DataFrame:
 
         return pd.concat([headers, matrix], axis=0)
 
-    def extract_date(self, df: pd.DataFrame) -> Tuple[pd.Index, pd.DataFrame]:
+    def extract_date(self, df: pd.DataFrame) -> Tuple[pd.Index[str], pd.DataFrame]:
         # Extract left part with date
         df_date = df.iloc[:, 2:3]
         df_date.columns = pd.Index(["month"])
@@ -222,7 +224,7 @@ class AnnualMatrixSerializer(IDateMatrixSerializer):
     Class implementation for annual index
     """
 
-    def build_date(self, index: pd.Index) -> pd.DataFrame:
+    def build_date(self, index: pd.Index[str]) -> pd.DataFrame:
         return pd.DataFrame(
             [
                 [self.area.upper(), "annual"],
@@ -232,7 +234,7 @@ def build_date(self, index: pd.Index) -> pd.DataFrame:
             ]
         )
 
-    def extract_date(self, df: pd.DataFrame) -> Tuple[pd.Index, pd.DataFrame]:
+    def extract_date(self, df: pd.DataFrame) -> Tuple[pd.Index[str], pd.DataFrame]:
         # Extract left part with date
         df_date = df.iloc[:, 1:2]
         df_date.columns = pd.Index(["annual"])
diff --git a/antarest/study/storage/rawstudy/model/filesystem/matrix/matrix.py b/antarest/study/storage/rawstudy/model/filesystem/matrix/matrix.py
index 9c421f59e1..427631427a 100644
--- a/antarest/study/storage/rawstudy/model/filesystem/matrix/matrix.py
+++ b/antarest/study/storage/rawstudy/model/filesystem/matrix/matrix.py
@@ -12,7 +12,7 @@
 
 import logging
 from abc import ABC, abstractmethod
-from enum import Enum
+from enum import StrEnum
 from pathlib import Path
 from typing import Any, List, Optional, Union, cast
 
@@ -27,7 +27,7 @@
 logger = logging.getLogger(__name__)
 
 
-class MatrixFrequency(str, Enum):
+class MatrixFrequency(StrEnum):
     """
     An enumeration of matrix frequencies.
 
diff --git a/antarest/study/storage/variantstudy/model/command/icommand.py b/antarest/study/storage/variantstudy/model/command/icommand.py
index eb9a1f1285..537b5ddb5b 100644
--- a/antarest/study/storage/variantstudy/model/command/icommand.py
+++ b/antarest/study/storage/variantstudy/model/command/icommand.py
@@ -139,8 +139,8 @@ def match(self, other: "ICommand", equal: bool = False) -> bool:
         if not isinstance(other, self.__class__):
             return False
         excluded_fields = set(ICommand.model_fields)
-        this_values = self.model_dump(exclude=excluded_fields)
-        that_values = other.model_dump(exclude=excluded_fields)
+        this_values = self.model_dump(mode="json", exclude=excluded_fields)
+        that_values = other.model_dump(mode="json", exclude=excluded_fields)
         return this_values == that_values
 
     @abstractmethod
diff --git a/antarest/study/storage/variantstudy/model/command/update_binding_constraint.py b/antarest/study/storage/variantstudy/model/command/update_binding_constraint.py
index bc582d0036..423c431d38 100644
--- a/antarest/study/storage/variantstudy/model/command/update_binding_constraint.py
+++ b/antarest/study/storage/variantstudy/model/command/update_binding_constraint.py
@@ -168,7 +168,7 @@ def _apply(self, study_data: FileStudy) -> CommandOutput:
         study_version = study_data.config.version
         # rename matrices if the operator has changed for version >= 870
         if self.operator and study_version >= STUDY_VERSION_8_7:
-            existing_operator = BindingConstraintOperator(actual_cfg.get("operator"))
+            existing_operator = BindingConstraintOperator(actual_cfg["operator"])
             new_operator = self.operator
             update_matrices_names(study_data, self.id, existing_operator, new_operator)
 
@@ -178,7 +178,7 @@ def _apply(self, study_data: FileStudy) -> CommandOutput:
             term for term in [m.value for m in TermMatrices] if hasattr(self, term) and getattr(self, term)
         ]
 
-        time_step = self.time_step or BindingConstraintFrequency(actual_cfg.get("type"))
+        time_step = self.time_step or BindingConstraintFrequency(actual_cfg["type"])
         self.validates_and_fills_matrices(
             time_step=time_step, specific_matrices=updated_matrices or None, version=study_version, create=False
         )
diff --git a/antarest/study/web/study_data_blueprint.py b/antarest/study/web/study_data_blueprint.py
index e5c3166261..afd7f119c0 100644
--- a/antarest/study/web/study_data_blueprint.py
+++ b/antarest/study/web/study_data_blueprint.py
@@ -94,7 +94,7 @@ class BCKeyValueType(te.TypedDict):
     value: t.Union[str, int, float, bool]
 
 
-class ClusterType(str, enum.Enum):
+class ClusterType(enum.StrEnum):
     """
     Cluster type:
 
diff --git a/docs/install/0-INSTALL.md b/docs/install/0-INSTALL.md
index 388f98b5f7..8206af7c6e 100644
--- a/docs/install/0-INSTALL.md
+++ b/docs/install/0-INSTALL.md
@@ -8,7 +8,7 @@ A local build allows using Antares Web as a desktop application.
 
 Requirements:
 
-- python : 3.8.x
+- python : 3.11.x
 - node : 18.16.1
 
 Then perform the following steps:
diff --git a/pyproject.toml b/pyproject.toml
index 42c259d133..cfde64c238 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,12 +8,9 @@ authors = [{name="RTE, Antares Web Team", email="andrea.sgattoni@rte-france.com"
 description="Antares Server"
 readme = {file = "README.md", content-type = "text/markdown"}
 license = {file = "LICENSE"}
-requires-python = ">=3.8"
+requires-python = ">=3.11"
 classifiers=[
         "Programming Language :: Python :: 3 :: Only",
-        "Programming Language :: Python :: 3.8",
-        "Programming Language :: Python :: 3.9",
-        "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "License :: Apache License :: 2.0",
         "Operating System :: OS Independent",
@@ -126,8 +123,8 @@ exclude = [
 line-length = 120
 indent-width = 4
 
-# Assume Python 3.8
-target-version = "py38"
+# Assumes Python 3.11
+target-version = "py311"
 
 [tool.ruff.lint]
 # Enable Pyflakes (`F`) and a subset of the pycodestyle (`E`)  codes by default.
diff --git a/readthedocs.yml b/readthedocs.yml
index bf990c8405..d0135160a8 100644
--- a/readthedocs.yml
+++ b/readthedocs.yml
@@ -8,7 +8,7 @@ version: 2
 build:
   os: ubuntu-22.04
   tools:
-    python: '3.8'
+    python: '3.11'
 
 mkdocs:
   configuration: mkdocs.yml
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 462d77bb3c..14c06c1ed6 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -4,16 +4,16 @@
 black~=23.7.0
 isort~=5.12.0
 mypy~=1.11.1
-pyinstaller==5.6.2
-pyinstaller-hooks-contrib==2024.6
+pyinstaller==6.10.0
+pyinstaller-hooks-contrib==2024.8
 
 # Extra requirements installed by `mypy --install-types`.
 # IMPORTANT: Make sure the versions of these typing libraries match the versions
 # of the corresponding implementation libraries used in production (in `requirements.txt`).
 
-pandas-stubs~=1.4.0
+pandas-stubs~=2.2.2
 types-paramiko~=3.4.0
-types-psycopg2~=2.9.4
+types-psycopg2~=2.9.9
 types-redis~=4.1.2
 types-requests~=2.27.1
 types-PyYAML~=5.4.1
diff --git a/requirements.txt b/requirements.txt
index eefa07d92f..2e191bb01f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,18 +33,16 @@ humanize~=4.11.0; python_version > '3.8'
 jsonref~=0.2
 PyJWT~=2.9.0
 MarkupSafe~=2.0.1
-numpy~=1.22.1
-pandas~=1.4.0
+numpy~=1.26.4
+pandas~=2.2.3
 paramiko~=3.4.1
 plyer~=2.0.0
-psycopg2-binary==2.9.4
+psycopg2-binary~=2.9.9
 py7zr~=0.20.6
 python-json-logger~=2.0.7
-PyYAML~=5.4.1; python_version <= '3.9'
-PyYAML~=5.3.1; python_version > '3.9'
+PyYAML~=5.3.1
 redis~=4.1.2
 SQLAlchemy~=1.4.46
-tables==3.6.1; python_version <= '3.8'
-tables==3.9.2; python_version > '3.8'
+tables==3.9.2
 typing_extensions~=4.12.2
 xlsxwriter~=3.2.0
\ No newline at end of file
diff --git a/scripts/install-debug.sh b/scripts/install-debug.sh
deleted file mode 100755
index 2ada4a30c4..0000000000
--- a/scripts/install-debug.sh
+++ /dev/null
@@ -1,8 +0,0 @@
-#!/bin/bash
-
-set -e
-
-python3 -m venv /debug_env
-source /debug_env/bin/activate
-pip3 install pystack-debugger
-deactivate
\ No newline at end of file
diff --git a/scripts/stacktrace.sh b/scripts/stacktrace.sh
deleted file mode 100755
index 4ce721ad78..0000000000
--- a/scripts/stacktrace.sh
+++ /dev/null
@@ -1,6 +0,0 @@
-#!/bin/bash
-
-source /debug_env/bin/activate
-echo "Printing stacktraces"
-ps aux | grep python | awk '{print $2}' | xargs -I{} bash -c "echo {}; pystack --include-greenlet {}"
-echo "Done"
\ No newline at end of file
diff --git a/sonar-project.properties b/sonar-project.properties
index fa40909147..dd7384df7d 100644
--- a/sonar-project.properties
+++ b/sonar-project.properties
@@ -4,7 +4,7 @@ sonar.sources=antarest, webapp/src
 sonar.language=python, js
 sonar.exclusions=antarest/gui.py,antarest/main.py
 sonar.python.coverage.reportPaths=coverage.xml
-sonar.python.version=3.8
+sonar.python.version=3.11
 sonar.javascript.lcov.reportPaths=webapp/coverage/lcov.info
 sonar.projectVersion=2.17.6
 sonar.coverage.exclusions=antarest/gui.py,antarest/main.py,antarest/singleton_services.py,antarest/worker/archive_worker_service.py,webapp/**/*,,antarest/fastapi_jwt_auth/**
\ No newline at end of file
diff --git a/tests/cache/test_local_cache.py b/tests/cache/test_local_cache.py
index 3242d92533..dc6382cac5 100644
--- a/tests/cache/test_local_cache.py
+++ b/tests/cache/test_local_cache.py
@@ -43,11 +43,11 @@ def test_lifecycle():
     id = "some_id"
     duration = 3600
     timeout = int(time.time()) + duration
-    cache_element = LocalCacheElement(duration=duration, data=config.model_dump(), timeout=timeout)
+    cache_element = LocalCacheElement(duration=duration, data=config.model_dump(mode="json"), timeout=timeout)
 
     # PUT
-    cache.put(id=id, data=config.model_dump(), duration=duration)
+    cache.put(id=id, data=config.model_dump(mode="json"), duration=duration)
     assert cache.cache[id] == cache_element
 
     # GET
-    assert cache.get(id=id) == config.model_dump()
+    assert cache.get(id=id) == config.model_dump(mode="json")
diff --git a/tests/cache/test_redis_cache.py b/tests/cache/test_redis_cache.py
index f5fe9c37a3..808131fabb 100644
--- a/tests/cache/test_redis_cache.py
+++ b/tests/cache/test_redis_cache.py
@@ -42,7 +42,7 @@ def test_lifecycle():
     id = "some_id"
     redis_key = f"cache:{id}"
     duration = 3600
-    cache_element = RedisCacheElement(duration=duration, data=config.model_dump()).model_dump_json()
+    cache_element = RedisCacheElement(duration=duration, data=config.model_dump(mode="json")).model_dump_json()
 
     # GET
     redis_client.get.return_value = cache_element
@@ -53,7 +53,7 @@ def test_lifecycle():
 
     # PUT
     duration = 7200
-    cache_element = RedisCacheElement(duration=duration, data=config.model_dump()).model_dump_json()
-    cache.put(id=id, data=config.model_dump(), duration=duration)
+    cache_element = RedisCacheElement(duration=duration, data=config.model_dump(mode="json")).model_dump_json()
+    cache.put(id=id, data=config.model_dump(mode="json"), duration=duration)
     redis_client.set.assert_called_once_with(redis_key, cache_element)
     redis_client.expire.assert_called_with(redis_key, duration)
diff --git a/tests/integration/test_integration.py b/tests/integration/test_integration.py
index da7b312e9c..a9fa59088f 100644
--- a/tests/integration/test_integration.py
+++ b/tests/integration/test_integration.py
@@ -606,15 +606,15 @@ def test_area_management(client: TestClient, admin_access_token: str) -> None:
 
     res = client.get(f"/v1/studies/{study_id}/layers")
     res.raise_for_status()
-    assert res.json() == [LayerInfoDTO(id="0", name="All", areas=["area 1", "area 2"]).model_dump()]
+    assert res.json() == [LayerInfoDTO(id="0", name="All", areas=["area 1", "area 2"]).model_dump(mode="json")]
 
     res = client.post(f"/v1/studies/{study_id}/layers?name=test")
     assert res.json() == "1"
 
     res = client.get(f"/v1/studies/{study_id}/layers")
     assert res.json() == [
-        LayerInfoDTO(id="0", name="All", areas=["area 1", "area 2"]).model_dump(),
-        LayerInfoDTO(id="1", name="test", areas=[]).model_dump(),
+        LayerInfoDTO(id="0", name="All", areas=["area 1", "area 2"]).model_dump(mode="json"),
+        LayerInfoDTO(id="1", name="test", areas=[]).model_dump(mode="json"),
     ]
 
     res = client.put(f"/v1/studies/{study_id}/layers/1?name=test2")
@@ -625,8 +625,8 @@ def test_area_management(client: TestClient, admin_access_token: str) -> None:
     assert res.status_code in {200, 201}, res.json()
     res = client.get(f"/v1/studies/{study_id}/layers")
     assert res.json() == [
-        LayerInfoDTO(id="0", name="All", areas=["area 1", "area 2"]).model_dump(),
-        LayerInfoDTO(id="1", name="test2", areas=["area 2"]).model_dump(),
+        LayerInfoDTO(id="0", name="All", areas=["area 1", "area 2"]).model_dump(mode="json"),
+        LayerInfoDTO(id="1", name="test2", areas=["area 2"]).model_dump(mode="json"),
     ]
 
     # Delete the layer '1' that has 1 area
diff --git a/tests/variantstudy/conftest.py b/tests/variantstudy/conftest.py
index beaaf34065..6d3039d4f9 100644
--- a/tests/variantstudy/conftest.py
+++ b/tests/variantstudy/conftest.py
@@ -94,11 +94,7 @@ def get_matrix_id(matrix: t.Union[t.List[t.List[float]], str]) -> str:
         Get the matrix ID from a matrix or a matrix link.
         """
         if isinstance(matrix, str):
-            # str.removeprefix() is not available in Python 3.8
-            prefix = "matrix://"
-            if matrix.startswith(prefix):
-                return matrix[len(prefix) :]
-            return matrix
+            return matrix.removeprefix("matrix://")
         elif isinstance(matrix, list):
             return create(matrix)
         else:
diff --git a/tests/variantstudy/model/command/test_create_area.py b/tests/variantstudy/model/command/test_create_area.py
index 0bb8c104c7..d6593a929b 100644
--- a/tests/variantstudy/model/command/test_create_area.py
+++ b/tests/variantstudy/model/command/test_create_area.py
@@ -15,6 +15,7 @@
 
 import pytest
 
+from antarest.study.storage.rawstudy.ini_reader import IniReader
 from antarest.study.storage.rawstudy.model.filesystem.config.model import EnrModelling, transform_name_to_id
 from antarest.study.storage.rawstudy.model.filesystem.factory import FileStudy
 from antarest.study.storage.variantstudy.business.command_reverter import CommandReverter
@@ -96,9 +97,9 @@ def test_apply(
 
         # Allocation
         assert (study_path / "input" / "hydro" / "allocation" / f"{area_id}.ini").exists()
-        allocation = configparser.ConfigParser()
-        allocation.read(study_path / "input" / "hydro" / "allocation" / f"{area_id}.ini")
-        assert int(allocation["[allocation"][area_id]) == 1
+        reader = IniReader()
+        allocation = reader.read(study_path / "input" / "hydro" / "allocation" / f"{area_id}.ini")
+        assert int(allocation["[allocation]"][area_id]) == 1
 
         # Capacity
         assert (study_path / "input" / "hydro" / "common" / "capacity" / f"maxpower_{area_id}.txt.link").exists()
diff --git a/tests/variantstudy/test_command_factory.py b/tests/variantstudy/test_command_factory.py
index b78ba393e5..dd47e0453c 100644
--- a/tests/variantstudy/test_command_factory.py
+++ b/tests/variantstudy/test_command_factory.py
@@ -386,11 +386,7 @@
 @pytest.fixture
 def command_factory() -> CommandFactory:
     def get_matrix_id(matrix: str) -> str:
-        # str.removeprefix() is not available in Python 3.8
-        prefix = "matrix://"
-        if matrix.startswith(prefix):
-            return matrix[len(prefix) :]
-        return matrix
+        return matrix.removeprefix("matrix://")
 
     return CommandFactory(
         generator_matrix_constants=Mock(spec=GeneratorMatrixConstants),