diff --git a/src/bentoml/_internal/server/runner_app.py b/src/bentoml/_internal/server/runner_app.py
index 44a56ef93d..786ad32456 100644
--- a/src/bentoml/_internal/server/runner_app.py
+++ b/src/bentoml/_internal/server/runner_app.py
@@ -275,7 +275,7 @@ async def _request_handler(request: Request) -> Response:
                     content=str(e),
                     headers={
                         PAYLOAD_META_HEADER: "{}",
-                        "Content-Type": "application/vnd.bentoml.error}",
+                        "Content-Type": "application/vnd.bentoml.error",
                         "Server": server_str,
                     },
                 )