diff --git a/endpoints/trigger.py b/endpoints/trigger.py
index 4a10485ae..c7c47db79 100644
--- a/endpoints/trigger.py
+++ b/endpoints/trigger.py
@@ -377,7 +377,7 @@ class GithubBuildTrigger(BuildTrigger):
       gh_client = self._get_client(auth_token)
       source = config['build_source']
       repo = gh_client.get_repo(source)
-      branches = [branch['name'] for branch in repo.get_branches()]
+      branches = [branch.name for branch in repo.get_branches()]
 
       if not repo.default_branch in branches:
         branches.insert(0, repo.default_branch)