diff --git a/openid.py b/openid.py
index ab8692e..c3d68a6 100644
--- a/openid.py
+++ b/openid.py
@@ -58,7 +58,7 @@ def get_key(self, keyId):
 
         # Refresh the cache if it's more than 5 days old.
         if diff.total_seconds() > 5 * 24 * 60 * 60:
-            refresh_cache()
+            refresh_cache(self._url)
 
         keys  = OpenIDConnectConfiguration.signing_keys.get(self._url)
         if keys is not None: