diff --git a/antarest/study/model.py b/antarest/study/model.py
index 9c80c32b7e..547912adfb 100644
--- a/antarest/study/model.py
+++ b/antarest/study/model.py
@@ -19,7 +19,7 @@
 from pathlib import Path
 
 from antares.study.version import StudyVersion
-from pydantic import BaseModel, field_validator, field_serializer
+from pydantic import BaseModel, field_serializer, field_validator
 from sqlalchemy import (  # type: ignore
     Boolean,
     Column,
@@ -359,7 +359,7 @@ class StudyMetadataDTO(BaseModel):
     folder: t.Optional[str] = None
     tags: t.List[str] = []
 
-    @field_serializer('version')
+    @field_serializer("version")
     def serialize_version(self, version: StudyVersion) -> int:
         return version.__int__()
 
diff --git a/antarest/study/storage/rawstudy/model/filesystem/config/model.py b/antarest/study/storage/rawstudy/model/filesystem/config/model.py
index aea8bb0640..8e251f96d9 100644
--- a/antarest/study/storage/rawstudy/model/filesystem/config/model.py
+++ b/antarest/study/storage/rawstudy/model/filesystem/config/model.py
@@ -15,7 +15,7 @@
 from pathlib import Path
 
 from antares.study.version import StudyVersion
-from pydantic import BaseModel, Field, model_validator, field_serializer, field_validator
+from pydantic import BaseModel, Field, field_serializer, field_validator, model_validator
 
 from antarest.core.utils.utils import DTO
 from antarest.study.business.enum_ignore_case import EnumIgnoreCase
@@ -318,7 +318,7 @@ class FileStudyTreeConfigDTO(BaseModel):
     enr_modelling: str = str(EnrModelling.AGGREGATED)
     zip_path: t.Optional[Path] = None
 
-    @field_serializer('version')
+    @field_serializer("version")
     def serialize_version(self, version: StudyVersion) -> int:
         return version.__int__()
 
@@ -326,7 +326,6 @@ def serialize_version(self, version: StudyVersion) -> int:
     def _validate_version(cls, v: t.Any) -> StudyVersion:
         return StudyVersion.parse(v)
 
-
     @staticmethod
     def from_build_config(
         config: FileStudyTreeConfig,