diff --git a/src/fixit/config.py b/src/fixit/config.py
index 8b596092..79b3b8be 100644
--- a/src/fixit/config.py
+++ b/src/fixit/config.py
@@ -69,6 +69,9 @@ def __init__(self, msg: str, rule: QualifiedRule):
         super().__init__(msg)
         self.rule = rule
 
+    def __reduce__(self):
+        return type(self), (*self.args, self.rule)
+
 
 def is_rule(obj: Type[T]) -> bool:
     """