diff --git a/huntflow_api_client/models/common.py b/huntflow_api_client/models/common.py
index 475e1f7..dd614e8 100644
--- a/huntflow_api_client/models/common.py
+++ b/huntflow_api_client/models/common.py
@@ -29,17 +29,18 @@ def jsonable_dict(
         round_trip: bool = False,
         warnings: bool = True,
     ) -> Dict[str, Any]:
-        params = {
-            "include": include,
-            "exclude": exclude,
-            "by_alias": by_alias,
-            "exclude_unset": exclude_unset,
-            "exclude_defaults": exclude_defaults,
-            "exclude_none": exclude_none,
-            "round_trip": round_trip,
-            "warnings": warnings,
-        }
-        return json.loads(self.model_dump_json(**params))  # type: ignore
+        return json.loads(
+            self.model_dump_json(
+                include=include,
+                exclude=exclude,
+                by_alias=by_alias,
+                exclude_unset=exclude_unset,
+                exclude_defaults=exclude_defaults,
+                exclude_none=exclude_none,
+                round_trip=round_trip,
+                warnings=warnings,
+            )
+        )  # type: ignore
 
 
 class PaginatedResponse(BaseModel):
diff --git a/huntflow_api_client/models/request/resume.py b/huntflow_api_client/models/request/resume.py
index d5ba177..2739332 100644
--- a/huntflow_api_client/models/request/resume.py
+++ b/huntflow_api_client/models/request/resume.py
@@ -6,15 +6,12 @@
 
 
 class ApplicantResumeUpdateData(BaseModel):
-    body: Optional[str] = Field(None, description="Resume text")
+    body: Optional[str] = Field(..., description="Resume text")
 
 
 class ApplicantResumeUpdateRequest(JsonRequestModel):
-    account_source: Optional[PositiveInt] = Field(None, description="Resume source ID")
-    data: Optional[ApplicantResumeUpdateData] = Field(
-        None,
-        description="Resume data",
-    )
+    account_source: Optional[PositiveInt] = Field(..., description="Resume source ID")
+    data: Optional[ApplicantResumeUpdateData] = Field(..., description="Resume data")
     files: Optional[List[PositiveInt]] = Field(
         [],
         max_length=1,
diff --git a/huntflow_api_client/models/response/applicant_logs.py b/huntflow_api_client/models/response/applicant_logs.py
index 15f1ee1..e62e433 100644
--- a/huntflow_api_client/models/response/applicant_logs.py
+++ b/huntflow_api_client/models/response/applicant_logs.py
@@ -32,7 +32,7 @@ class BaseSurveySchemaType(BaseModel):
 
 
 class SurveySchemaTypeQLogResponse(BaseSurveySchemaType):
-    title: Optional[str] = Field(None, description="Survey title")
+    title: Optional[str] = Field(..., description="Survey title")
 
 
 class ApplicantLogSurveyQuestionary(BaseModel):
@@ -183,7 +183,7 @@ class CreateApplicantLogResponse(BaseModel):
     rejection_reason: Optional[int] = Field(None, description="Rejection reason ID")
     created: datetime = Field(..., description="Date and time of creation of the log")
     employment_date: Optional[date] = Field(None, description="Employment date")
-    applicant_offer: Optional[ApplicantOffer] = Field(None, description="Offer object")
+    applicant_offer: Optional[ApplicantOffer] = Field(..., description="Offer object")
     comment: Optional[str] = Field(None, description="Comment text")
     files: List[File] = Field([], description="List of files attached to the log")
     calendar_event: Optional[ApplicantLogCalendarEvent] = Field(
diff --git a/huntflow_api_client/models/response/applicants.py b/huntflow_api_client/models/response/applicants.py
index 8cfc58d..4c980a6 100644
--- a/huntflow_api_client/models/response/applicants.py
+++ b/huntflow_api_client/models/response/applicants.py
@@ -90,7 +90,7 @@ class ApplicantItem(Applicant):
 
 
 class ApplicantListResponse(PaginatedResponse):
-    total_items: Optional[int] = Field(None, description="Total number of items")
+    total_items: Optional[int] = Field(..., description="Total number of items")
     items: List[ApplicantItem] = Field(..., description="List of applicants")
 
 
diff --git a/huntflow_api_client/models/response/coworkers.py b/huntflow_api_client/models/response/coworkers.py
index ffeb94c..44a954e 100644
--- a/huntflow_api_client/models/response/coworkers.py
+++ b/huntflow_api_client/models/response/coworkers.py
@@ -27,5 +27,5 @@ class ConfigDict:
 
 
 class CoworkersListResponse(PaginatedResponse):
-    total_items: Optional[int] = Field(None, description="Total number of items")
+    total_items: Optional[int] = Field(..., description="Total number of items")
     items: List[CoworkerResponse] = Field(..., description="List of coworkers")
diff --git a/huntflow_api_client/models/response/vacancies.py b/huntflow_api_client/models/response/vacancies.py
index 7c2112c..bc03c24 100644
--- a/huntflow_api_client/models/response/vacancies.py
+++ b/huntflow_api_client/models/response/vacancies.py
@@ -58,7 +58,7 @@ def dict(self, *args, **kwargs):  # type: ignore
 
 
 class VacancyListResponse(PaginatedResponse):
-    total_items: Optional[int] = Field(None, description="Total number of items")
+    total_items: Optional[int] = Field(..., description="Total number of items")
     items: List[VacancyItem]