diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 27b2dc8..8220952 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -3,7 +3,7 @@ name: CI
 on:
   push:
     branches:
-      - 'master'
+      - '*.x'
     tags:
       - '[0-9].[0-9]+'
   pull_request: