diff --git a/.ruby-version b/.ruby-version
index 005119ba..437459cd 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.4.1
+2.5.0
diff --git a/.travis.yml b/.travis.yml
index 66d760d7..3eb955b1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,7 +6,8 @@ addons:
 
 language: ruby
 rvm:
-- 2.4.1
+- 2.4.3
+- 2.5.0
 script:
   - bundle exec rspec
 notifications:
diff --git a/Dockerfile b/Dockerfile
index 37c328ee..d7ace7f6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:2.1.2
+FROM ruby:2.5.0
 
 # some of ruby's build scripts are written in ruby
 # we purge this later to make sure our final image uses what we just built