diff --git a/api/app/schemas/prompt_optimizer_schema.py b/api/app/schemas/prompt_optimizer_schema.py
index 92c7a90b..e1f27be0 100644
--- a/api/app/schemas/prompt_optimizer_schema.py
+++ b/api/app/schemas/prompt_optimizer_schema.py
@@ -54,7 +54,7 @@ class OptimizePromptResult(BaseModel):
 class CreateSessionResponse(BaseModel):
     model_config = {"from_attributes": True}
 
-    session_id: UUID = Field(
+    id: UUID = Field(
         ...,
         description="Session ID"
     )