diff --git a/msgpack/fallback.py b/msgpack/fallback.py
index 824f59d5..c2186d65 100644
--- a/msgpack/fallback.py
+++ b/msgpack/fallback.py
@@ -806,7 +806,7 @@ def _pack(
     def pack(self, obj):
         try:
             self._pack(obj)
-        except:
+        except Exception:
             self._buffer = BytesIO()  # force reset
             raise
         if self._autoreset: