1 files changed, 1 insertions, 0 deletions
diff --git a/Gemfile b/Gemfile
index b5c6312c52..f3dea80e45 100644
--- a/Gemfile
+++ b/Gemfile
@@ -29,6 +29,7 @@ gem "uglifier", ">= 1.3.0", require: false
 gem "json", ">= 2.0.0"
 
 gem "rubocop", ">= 0.47", require: false
+gem "rubocop-performance", require: false
 
 group :doc do
   gem "sdoc", "~> 1.0"