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 47ba2f40..4e52287a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source "https://rubygems.org"
 
-ruby "2.3.3"
+ruby "2.4.1"
 
 gem "pg"
 gem "rails", "5.0.2"
diff --git a/Gemfile.lock b/Gemfile.lock
index 83b83462..a17059af 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -259,7 +259,7 @@ GEM
     pry-rails (0.3.5)
       pry (>= 0.9.10)
     public_suffix (2.0.5)
-    puma (3.7.1)
+    puma (3.8.2)
     pundit (1.1.0)
       activesupport (>= 3.0.0)
     rack (2.0.1)
@@ -507,7 +507,7 @@ DEPENDENCIES
   webmock
 
 RUBY VERSION
-   ruby 2.3.3p222
+   ruby 2.4.1p111
 
 BUNDLED WITH
    1.14.6