diff --git a/pr_agent/servers/github_action_runner.py b/pr_agent/servers/github_action_runner.py
index 98334339..714e7297 100644
--- a/pr_agent/servers/github_action_runner.py
+++ b/pr_agent/servers/github_action_runner.py
@@ -56,13 +56,13 @@ async def run_action():
             pr_url = event_payload.get("pull_request", {}).get("url")
             if pr_url:
                 auto_review = os.environ.get('github_action.auto_review', None)
-                if auto_review is None or auto_review.lower() == 'true':
+                if auto_review is None or (isinstance(auto_review, str) and auto_review.lower() == 'true'):
                     await PRReviewer(pr_url).run()
                 auto_describe = os.environ.get('github_action.auto_describe', None)
-                if auto_describe.lower() == 'true':
+                if isinstance(auto_describe, str) and auto_describe.lower() == 'true':
                     await PRDescription(pr_url).run()
                 auto_improve = os.environ.get('github_action.auto_improve', None)
-                if auto_improve.lower() == 'true':
+                if isinstance(auto_improve, str) and auto_improve.lower() == 'true':
                     await PRCodeSuggestions(pr_url).run()
 
     # Handle issue comment event