diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 540bb11..e72d7c5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,7 +2,7 @@ name: CI
 
 on:
   push:
-    branches: ["*"]
+    branches: [master]
     paths:
       - grammar.js
       - src/**