diff --git a/google/oauth2/id_token.py b/google/oauth2/id_token.py
index a555a852a..60db8aed0 100644
--- a/google/oauth2/id_token.py
+++ b/google/oauth2/id_token.py
@@ -64,7 +64,7 @@
 from google.auth import jwt
 from google.auth import transport
 
-from typing import Union
+from typing import Any, Mapping, Union
 
 
 # The URL that provides public certificates for verifying ID tokens issued