diff --git a/.appveyor.yml b/.appveyor.yml
index 0ef0deb2..f08990d0 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -23,6 +23,10 @@ test_script:
   - cargo test
   - cargo build --release -p wasm-bindgen-cli
 
+branches:
+  only:
+    - master
+
 before_deploy:
   - ps: |
         $NAME = "wasm-bindgen-${env:APPVEYOR_REPO_TAG_NAME}-${env:TARGET}"
diff --git a/.travis.yml b/.travis.yml
index 8837315d..ddddc894 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -121,6 +121,9 @@ matrix:
         on:
           branch: master
 
+branches:
+  only:
+  - master
 
 notifications:
   email: