diff --git a/app.py b/app.py
index ee9a8bc..efcc805 100644
--- a/app.py
+++ b/app.py
@@ -73,7 +73,7 @@ def callback():
     key = response["key"]
     calendar_url = (
         f"{config['app_url']}/calendar?"
-        + urlencode({"order": "desc", "api_key": key})
+        + urlencode({"order": "desc", "user_api_key": key})
     )
 
     return render_template(