diff --git a/Gemfile b/Gemfile
index 1a15a61a..66c149ef 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,5 @@
 source 'https://rubygems.org'
-ruby '2.3.1'
+ruby '2.4.1'
 git_source(:github) do |repo_name|
   repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include?("/")
   "https://github.com/#{repo_name}.git"