diff --git a/.travis.yml b/.travis.yml
index 630e2413..9907a284 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -27,7 +27,7 @@ before_install:
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then export DISPLAY=:99.0; sh -e /etc/init.d/xvfb start; sleep 3; 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