diff --git a/.circleci/config.yml b/.circleci/config.yml
index 63bcc6d..2ec605b 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -4,7 +4,7 @@ defaults:
   env_setup: &env_setup
     working_directory: ~/chef-bashrc_manager
     docker:
-      - image: circleci/ruby:2.4.1
+      - image: circleci/ruby:2.5.0
 
   bundle_cache_name: &bundle_cache_name
     bundler-cache-v1-{{ checksum "Gemfile.lock" }}
diff --git a/Gemfile b/Gemfile
index 8bf96c8..a234afe 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-ruby '2.4.1'
+ruby File.open(File.expand_path('.ruby-version', File.dirname(__FILE__))) { |f| f.read.chomp }
 
 gem 'berkshelf'
 gem 'chef', '~> 12'
diff --git a/Gemfile.lock b/Gemfile.lock
index 3ab276c..f31be4b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -410,7 +410,7 @@ DEPENDENCIES
   test-kitchen
 
 RUBY VERSION
-   ruby 2.4.1p111
+   ruby 2.5.0p0
 
 BUNDLED WITH
    1.16.1