diff --git a/.ruby-version b/.ruby-version
index 79a614418f..ecd7ee50cb 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.4.4
+2.5.8
diff --git a/Gemfile b/Gemfile
index 3bb97a7d99..f0d4e5fe6b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 source 'https://rubygems.org'
-ruby "2.4.4"
+ruby "2.5.8"
 git_source(:github) { |repo_name| "https://github.com/#{repo_name}.git" }
 
 gem 'rails', '~> 5.0.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index 6133697ee7..95b447fb83 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -709,7 +709,7 @@ DEPENDENCIES
   wkhtmltopdf-binary (= 0.12.5)
 
 RUBY VERSION
-   ruby 2.4.4p296
+   ruby 2.5.8p224
 
 BUNDLED WITH
    1.17.3