diff --git a/mesop/server/server.py b/mesop/server/server.py
index b63a65840..04317d1d5 100644
--- a/mesop/server/server.py
+++ b/mesop/server/server.py
@@ -51,6 +51,8 @@ def render_loop(
       )
 
   def yield_errors(error: pb.ServerError) -> Generator[str, None, None]:
+    if not runtime().debug_mode:
+      error.ClearField("traceback")
     ui_response = pb.UiResponse(error=error)
 
     yield serialize(ui_response)