diff --git a/lib/worker_multibuild.py b/lib/worker_multibuild.py
index 4400559..fbd10d5 100644
--- a/lib/worker_multibuild.py
+++ b/lib/worker_multibuild.py
@@ -52,7 +52,7 @@ ENTRYPOINT /usr/local/bin/buildbot_entrypoint.sh "$BUILDMASTER" "$WORKERNAME" "$
 """
 
 def get_secret():
-    with open(path.join(os.environ['HOME'], "secret.key"),'r') as f:
+    with open(path.join(os.environ['HOME'], "multibuild_parent_key.key"),'r') as f:
         data = f.read()
     return data