diff --git a/.travis.yml b/.travis.yml
index 4b1adc41..063e5de1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,9 +4,9 @@ cache: bundler
 
 matrix:
   include:
-    - rvm: 2.3.7
-    - rvm: 2.4.4
-    - rvm: 2.5.1
+    - rvm: 2.3.8
+    - rvm: 2.4.5
+    - rvm: 2.5.3
     - rvm: ruby-head
   allow_failures:
     - rvm: ruby-head