diff --git a/.travis.yml b/.travis.yml
index 889da91..859bd95 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,8 @@ bundler_args: ""
 rvm:
   - 1.9.3
   - 2.0.0
-  - 2.1.2
+  - 2.1.7
+  - 2.2.4
 gemfile:
   - gemfiles/58.gemfile
   - gemfiles/57.gemfile
@@ -13,3 +14,4 @@ gemfile:
   - gemfiles/52.gemfile
   - gemfiles/51.gemfile
   - gemfiles/50.gemfile
+before_install: gem i bundler
diff --git a/Gemfile.lock b/Gemfile.lock
index ca1b4fc..55927b3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -42,6 +42,3 @@ DEPENDENCIES
   rake
   rspec
   wwtd
-
-BUNDLED WITH
-   1.10.6