diff --git a/services/checker/main.py b/services/checker/main.py
index a4a0381..e77f7f5 100644
--- a/services/checker/main.py
+++ b/services/checker/main.py
@@ -279,7 +279,7 @@ async def execute_code(request: ExecutionRequest) -> ExecutionResponse:
             result_hash=result_hash,
             error=error[:5000],
         )
-        print(response)
+        print(response.model_dump_json())
         return response