diff --git a/.travis.yml b/.travis.yml
index 8ca7b31..7142f59 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,6 +12,10 @@
 sudo: false
 language: cpp
 
+branches:
+  only:
+    - master
+
 env:
     - CXX_STANDARD=c++17 BRANCH_TO_TEST=master
     - CXX_STANDARD=c++14 BRANCH_TO_TEST=master
diff --git a/appveyor.yml b/appveyor.yml
index 3a711e5..4770cb0 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -6,6 +6,10 @@
 
 skip_branch_with_pr: true
 
+branches:
+  only:
+    - master
+
 environment:
   matrix:
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015