diff --git a/.travis.yml b/.travis.yml
index 08796113..9072399a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -28,7 +28,7 @@ before_install:
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update; fi
 
 install:
-  - npm install
+  - yarn
 
 before_script:
   - npm prune
diff --git a/appveyor.yml b/appveyor.yml
index 1619b596..75f03d11 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -15,7 +15,7 @@ install:
   - ps: Install-Product node 6 x64
   - set CI=true
   - npm -g install npm@latest
-  - npm install
+  - yarn
 
 build: off