diff --git a/github_backup/github_backup.py b/github_backup/github_backup.py
index 25202d3..81386e0 100644
--- a/github_backup/github_backup.py
+++ b/github_backup/github_backup.py
@@ -707,7 +707,7 @@ def _request_url_error(template, retry_timeout):
     if retry_timeout >= 0:
         return True, retry_timeout
 
-    raise Exception("{} timed out to much, skipping!")
+    raise Exception("{} timed out to much, skipping!".format(template))
 
 
 class S3HTTPRedirectHandler(HTTPRedirectHandler):