.travis.yml in omniauth-1.9.0 vs .travis.yml in omniauth-1.9.1

@@ -1,8 +1,10 @@
 bundler_args: --without development
 before_install:
-  - gem update --system
-  - gem update bundler
+  - gem uninstall -v '>= 2' -i $(rvm gemdir)@global -ax bundler || true
+  - gem install bundler -v '1.17.3'
+install:
+ - bundle _1.17.3_ install --jobs=3 --retry=3
 cache: bundler
 env:
   global:
     - JRUBY_OPTS="$JRUBY_OPTS --debug"
 language: ruby