diff --git a/src/marshmallow/fields.py b/src/marshmallow/fields.py
index 383b34ef6..05831d676 100644
--- a/src/marshmallow/fields.py
+++ b/src/marshmallow/fields.py
@@ -1731,7 +1731,7 @@ class Email(String):
     #: Default error messages.
     default_error_messages = {"invalid": "Not a valid email address."}
 
-    def __init__(self, *args, **kwargs):
+    def __init__(self, *args, **kwargs) -> None:
         super().__init__(*args, **kwargs)
         # Insert validation into self.validators so that multiple errors can be stored.
         validator = validate.Email(error=self.error_messages["invalid"])