diff --git a/src/api/v1/router.py b/src/api/v1/router.py
index 40ff025..aee52f6 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.uid,
+            uid=request.userId,
         )
         
         return models.InsuranceChatResponse(
diff --git a/src/models.py b/src/models.py
index 0da8111..f34378e 100644
--- a/src/models.py
+++ b/src/models.py
@@ -58,7 +58,7 @@ class Address(BaseModel):
     zipcode: Optional[str] = Field("", description="Zip code")
 
 class EstimationRequest(BaseModel):
-    uid: Optional[str] = Field(None, description="Unique identifier")
+    userId: Optional[str] = Field(None, description="Unique identifier")
     applicants: List[Applicant]
     plans: List[Plan]
     phq: PHQ
@@ -85,7 +85,7 @@ class EstimationResponse(BaseModel):
     results: List[EstimationResult]
 
 class InsuranceChatRequest(BaseModel):
-    uid: int | None = None
+    userId: str | None = None
     message: str = Field(..., description="User message")
     session_id: Optional[str] = Field(None, description="Chat session ID")