diff --git a/.github/workflows/cmake_linux.yml b/.github/workflows/cmake_linux.yml
index 5dc0387d8..9e26e2cd0 100644
--- a/.github/workflows/cmake_linux.yml
+++ b/.github/workflows/cmake_linux.yml
@@ -3,6 +3,7 @@ name: CMake (Linux)
 on:
 
   push:
+    branches: [ "master" ]
     paths:
       - src/**
       - cmake/**
@@ -14,6 +15,7 @@ on:
       - "!**/Makefile*"
 
   pull_request:
+    branches: [ "master" ]
     paths:
       - src/**
       - cmake/**
diff --git a/.github/workflows/cmake_macos.yml b/.github/workflows/cmake_macos.yml
index c917932fe..d90c5f158 100644
--- a/.github/workflows/cmake_macos.yml
+++ b/.github/workflows/cmake_macos.yml
@@ -3,6 +3,7 @@ name: CMake (macos)
 on:
 
   push:
+    branches: [ "master" ]
     paths:
       - src/**
       - cmake/**
@@ -14,6 +15,7 @@ on:
       - "!**/Makefile*"
 
   pull_request:
+    branches: [ "master" ]
     paths:
       - src/**
       - cmake/**
diff --git a/.github/workflows/cmake_windows_msys2.yml b/.github/workflows/cmake_windows_msys2.yml
index eb83d4674..ef2e11ea7 100644
--- a/.github/workflows/cmake_windows_msys2.yml
+++ b/.github/workflows/cmake_windows_msys2.yml
@@ -3,6 +3,7 @@ name: CMake (Windows, msys2)
 on:
 
   push:
+    branches: [ "master" ]
     paths:
       - src/**
       - cmake/**
@@ -14,6 +15,7 @@ on:
       - "!**/Makefile*"
 
   pull_request:
+    branches: [ "master" ]
     paths:
       - src/**
       - cmake/**