diff --git a/.travis.yml b/.travis.yml
index 44a1528..aeeed81 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,12 +6,12 @@ before_install:
 
 matrix:
   include:
-    - rvm: 2.4.0
+    - rvm: 2.4.1
       script: bundle exec rake rubocop # ONLY lint once, first
     - rvm: 2.1
-    - rvm: 2.2
-    - rvm: 2.3.3
-    - rvm: 2.4.0
+    - rvm: 2.2.7
+    - rvm: 2.3.4
+    - rvm: 2.4.1
     - rvm: jruby-1.7.26
       env:
         - JRUBY_OPTS="--debug"