diff --git a/.travis.yml b/.travis.yml
index b2d2b4de7d..4b5c5a6530 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -97,6 +97,9 @@ install:
         npm install
         cd weex-playground/ios && pod install --repo-update
         cd ../../
+    elif [[ ("FORMAT_CODE" = "true" )]]; then
+        gem install bundler
+        bundle install
     fi
 
 script:
@@ -185,6 +188,7 @@ script:
     fi
 
     if [[ ("FORMAT_CODE" = "true" )]]; then
+        echo "exec danger ruby"
         bundle exec danger
     fi