diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 47e20f6..cc51708 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -1,6 +1,9 @@
 name: CD
 
-on: [push]
+on:
+  push:
+    branches:
+      - master
 
 jobs:
   build: