diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index cc70069a9..60011451d 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -2,9 +2,10 @@ name: CI
 
 on:
   push:
-    branches: [ $default-branch ]
+    branches:
+      - main
   pull_request:
-    branches: [ $default-branch ]
+      - main
   schedule:
     - cron: "21 0 * * *"