diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 29aea48..9979901 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -1,8 +1,10 @@
 name: Compile PDFs
 
 on:
-  push: {}
-  pull_request: {}
+  push:  
+    branches: [ master ]
+  pull_request: 
+    branches: [master]
 
 jobs:
   build: