diff --git a/.github/workflows/rubocop.yml b/.github/workflows/rubocop.yml
index 6a13f622..6c58f9f6 100644
--- a/.github/workflows/rubocop.yml
+++ b/.github/workflows/rubocop.yml
@@ -1,6 +1,10 @@
 name: Rubocop
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - 'master'
+  pull_request:
 
 jobs:
   rubocop:
diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index e213c2e0..c9384ef3 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -7,7 +7,11 @@
 
 name: Ruby
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - 'master'
+  pull_request:
 
 jobs:
   check_react_and_ujs: