diff --git a/.travis.yml b/.travis.yml
index 3be0271..167f93f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,9 @@
 language: ruby
 cache: bundler
 rvm:
-  - 2.1.8
-  - 2.2.4
-  - 2.3.0
+  - 2.1.9
+  - 2.2.5
+  - 2.3.1
 before_script:
   - mysql -e 'create database enju_test'
   - psql -c 'create database enju_test;' -U postgres