diff --git a/functions/source/GitPullS3/lambda_function.py b/functions/source/GitPullS3/lambda_function.py
index 4686be2..3d18384 100644
--- a/functions/source/GitPullS3/lambda_function.py
+++ b/functions/source/GitPullS3/lambda_function.py
@@ -191,7 +191,11 @@ def lambda_handler(event, context):
                 # Bibucket server
                 branch_name = event['body-json']['push']['changes'][0]['new']['name']
             except:
-                branch_name = 'master'
+                # Bitbucket Server v6.6.1
+                try:
+                    branch_name = event['body-json']['changes'][0]['ref']['displayId']
+                except:
+                    branch_name = 'master'
     try:
         # GitLab
         remote_url = event['body-json']['project']['git_ssh_url']