diff --git a/Gemfile b/Gemfile
index 8452dc5..8841647 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,4 +8,5 @@ group :test do
   gem "coveralls", "~>0.8", require: false
   gem "simplecov", "~>0.10", require: false
   gem "codeclimate-test-reporter", "~>0.4"
+  gem "overcommit", "~>0.31"
 end