diff --git a/exercise.py b/exercise.py
index 002a88c..7288c03 100644
--- a/exercise.py
+++ b/exercise.py
@@ -321,7 +321,7 @@ def mark_task_incomplete(user_id: int, exercise_uuid: str , task_uuid: str):
 def get_progress():
     completion_for_users = get_completion_for_users()
     progress = {}
-    for user_id in completion_for_users:
+    for user_id in completion_for_users.keys():
         progress[user_id] = {
             'email': db.USER_ID_TO_EMAIL_MAPPING[user_id],
             'exercises': {},