diff --git a/.github/workflows/check_directory.yml b/.github/workflows/check_directory.yml
index 77dadc2..fe76899 100644
--- a/.github/workflows/check_directory.yml
+++ b/.github/workflows/check_directory.yml
@@ -1,6 +1,10 @@
 name: Check api directory
 
-on: [push]
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
 
 jobs:
   build: