diff --git a/ci/r.yml b/ci/r.yml
index cad232b..efc6587 100644
--- a/ci/r.yml
+++ b/ci/r.yml
@@ -10,9 +10,9 @@ name: R
 
 on:
   push:
-    branches: [ master ]
+    branches: [ $default-branch ]
   pull_request:
-    branches: [ master ]
+    branches: [ $default-branch ]
 
 jobs:
   build: