diff --git a/.ruby-version b/.ruby-version
index 0bee604d..005119ba 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.3.3
+2.4.1
diff --git a/Gemfile b/Gemfile
index 33a5f303..4466c360 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
-ruby '2.3.3'
+ruby '2.4.1'
 
 source 'https://rubygems.org' do
   gem 'bourbon', '~> 4.3', '>= 4.3.4'
diff --git a/Gemfile.lock b/Gemfile.lock
index 21afbf2d..ebdf33da 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -101,7 +101,7 @@ DEPENDENCIES
   rake (~> 12.0)!
 
 RUBY VERSION
-   ruby 2.3.3p222
+   ruby 2.4.1p111
 
 BUNDLED WITH
-   1.14.6
+   1.15.1