diff --git a/.ruby-version b/.ruby-version
index 7e541aec..cc6612c3 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.2.2
\ No newline at end of file
+2.3.0
\ No newline at end of file
diff --git a/Dockerfile b/Dockerfile
index 7ad4d562..e7c09228 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 
-FROM ruby:2.2.2
+FROM ruby:2.3.0
 MAINTAINER Conor Heine <conor.heine@gmail.com>
 
 RUN apt-get update
diff --git a/Gemfile b/Gemfile
index b4fdbee8..cf87db06 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,5 @@
 source 'https://rubygems.org'
-ruby '2.2.2'
+ruby '2.3.0'
 
 gem 'rake'
 gem 'thor'
diff --git a/README.md b/README.md
index 88c4597e..2a796440 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@ Unless you wish to contribute to the project, I recommend using the hosted versi
 
 DevDocs is made of two separate pieces: a Ruby scraper that generates the documentation and metadata, and a JavaScript app powered by a small Sinatra app.
 
-DevDocs requires Ruby 2.2.2, libcurl, and a JavaScript runtime supported by [ExecJS](https://github.com/sstephenson/execjs#readme) (included in OS X and Windows; [Node.js](http://nodejs.org/) on Linux). Once you have these installed, run the following commands:
+DevDocs requires Ruby 2.3.0, libcurl, and a JavaScript runtime supported by [ExecJS](https://github.com/sstephenson/execjs#readme) (included in OS X and Windows; [Node.js](http://nodejs.org/) on Linux). Once you have these installed, run the following commands:
 
 ```
 git clone https://github.com/Thibaut/devdocs.git && cd devdocs
diff --git a/lib/app.rb b/lib/app.rb
index a45173da..817cb644 100644
--- a/lib/app.rb
+++ b/lib/app.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'bundler/setup'
 Bundler.require :app