.travis.yml in focuslight-0.2.1 vs .travis.yml in focuslight-0.2.2

@@ -6,8 +6,8 @@
 bundler_args: --deployment
 cache: bundler
 before_install:
   - sudo apt-get install rrdtool librrd-dev sqlite3 libsqlite3-dev
   - gem update --system
-  - gem install bundler
+  - gem install -v "1.17.3" bundler
 before_script:
   - bundle exec focuslight init