diff --git a/zuul.d/pipelines.yaml b/zuul.d/pipelines.yaml
index 3b5b5b4..b1f8784 100644
--- a/zuul.d/pipelines.yaml
+++ b/zuul.d/pipelines.yaml
@@ -118,7 +118,7 @@
     trigger:
       gerrit:
         - event: ref-updated
-          ref: ^refs/tags/[0-9]+(\.[0-9]+)*(a|b|rc)[0-9]+$
+          ref: ^refs/tags/[0-9]+(\.[0-9]+)*((a|b|rc)[0-9]+)?$
     success:
       mysql:
     failure: