diff --git a/.ruby-version b/.ruby-version
index 0bee604..437459c 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.3.3
+2.5.0
diff --git a/.travis.yml b/.travis.yml
index 180438c..2761dcc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,7 +12,8 @@ rvm:
   - 2.1
   - 2.2
   - 2.3.3
-  - 2.4.0
+  - 2.4.1
+  - 2.5.0
   - jruby-19mode
   - rbx-19mode
   - ruby-head