diff --git a/.travis.yml b/.travis.yml
index 587b4e509c..5a2787fa37 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,15 +18,15 @@ matrix:
   - os: osx
     rvm: 2.2.5
   - os: linux
-    rvm: 2.3.1
+    rvm: 2.3.5
   - os: osx
-    rvm: 2.3.1
+    rvm: 2.3.5
   - os: linux
-    rvm: 2.4.0
+    rvm: 2.4.2
     env:
       - RUBYOPT="--enable-frozen-string-literal --debug=frozen-string-literal"
   - os: osx
-    rvm: 2.4.0
+    rvm: 2.4.2
     env:
       - RUBYOPT="--enable-frozen-string-literal --debug=frozen-string-literal"
   - os: linux