diff --git a/src/api/v1/router.py b/src/api/v1/router.py
index aee52f6..18ed564 100644
--- a/src/api/v1/router.py
+++ b/src/api/v1/router.py
@@ -14,7 +14,7 @@ async def insurance_chat(request: models.InsuranceChatRequest):
         result = await chat_service.process_insurance_chat(
             message=request.message,
             session_id=request.session_id,
-            uid=request.userId,
+            uid=str(request.userId),
         )
         
         return models.InsuranceChatResponse(
diff --git a/src/models.py b/src/models.py
index f34378e..4451711 100644
--- a/src/models.py
+++ b/src/models.py
@@ -85,7 +85,7 @@ class EstimationResponse(BaseModel):
     results: List[EstimationResult]
 
 class InsuranceChatRequest(BaseModel):
-    userId: str | None = None
+    userId: str | int | None = None
     message: str = Field(..., description="User message")
     session_id: Optional[str] = Field(None, description="Chat session ID")