diff --git a/zuul.d/projects.yaml b/zuul.d/projects.yaml
index 66f12ae5ff..60233d55a4 100644
--- a/zuul.d/projects.yaml
+++ b/zuul.d/projects.yaml
@@ -27068,6 +27068,7 @@
     post:
       jobs:
         - propose-updates:
+            branches: master
             vars:
               update_target: requirements
     experimental: