diff --git a/.travis.yml b/.travis.yml
index 612948993..38088aef9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,9 +8,9 @@ rvm:
   - 1.9.3
   - 2.0.0
   - 2.1.10
-  - 2.2.7
-  - 2.3.4
-  - 2.4.1
+  - 2.2.8
+  - 2.3.5
+  - 2.4.2
   - ruby-head
 matrix:
   allow_failures: