diff --git a/smdebug/rules/action/stop_training_action.py b/smdebug/rules/action/stop_training_action.py
index 230096637..c60ac60fb 100644
--- a/smdebug/rules/action/stop_training_action.py
+++ b/smdebug/rules/action/stop_training_action.py
@@ -79,7 +79,7 @@ def _get_sm_tj_jobs_with_prefix(self):
                 )
                 break
 
-        return found_job_dict.keys()
+        return list(found_job_dict.keys())
 
     def _stop_training_job(self):
         if len(self._found_jobs) != 1: