diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 6f2bf086..13ce0c9e 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -2,7 +2,9 @@ name: CMake
 
 on:
   push:
+    branches: [ master ]
   pull_request:
+    branches: [ master ]
 
 env:
   # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)