diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4d1950ae..f38f7fec 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,7 +7,7 @@ env:
 on:
   pull_request:
   push:
-    branches: ['master']
+    branches: ['series/2.x']
   release:
     types:
       - published