diff --git a/src/officehours_api/backends/zoom.py b/src/officehours_api/backends/zoom.py
index 8afe1492..d86c398b 100644
--- a/src/officehours_api/backends/zoom.py
+++ b/src/officehours_api/backends/zoom.py
@@ -122,7 +122,7 @@ def _calculate_expires_at(cls, expires_in: int) -> float:
 
     @classmethod
     def _get_access_token(cls, user: User) -> str:
-        zoom_meta = user.profile.backend_metadata['zoom'].copy()
+        zoom_meta = user.profile.backend_metadata['zoom']
         if time() > zoom_meta['access_token_expires']:
             logger.debug('Refreshing token')
             resp = requests.post(