diff --git a/.github/workflows/php-security.yml b/.github/workflows/php-security.yml
index ddd238d..8cbb59d 100644
--- a/.github/workflows/php-security.yml
+++ b/.github/workflows/php-security.yml
@@ -11,7 +11,10 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
-on: [push, pull_request]
+on:
+  push:
+    branches: [main, master]
+  pull_request:
 permissions:
   contents: read
 jobs:
diff --git a/.github/workflows/rescript-deno-ci.yml b/.github/workflows/rescript-deno-ci.yml
index a7f1cd0..1a99a40 100644
--- a/.github/workflows/rescript-deno-ci.yml
+++ b/.github/workflows/rescript-deno-ci.yml
@@ -11,7 +11,10 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
-on: [push, pull_request]
+on:
+  push:
+    branches: [main, master]
+  pull_request:
 permissions:
   contents: read
 jobs: