1 files changed, 2 insertions, 0 deletions
diff --git a/Gemfile b/Gemfile
index edec721d6..fdfac330f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -145,3 +145,5 @@ group :production do
   gem 'lograge', '~> 0.10'
   gem 'redis-rails', '~> 5.0'
 end
+
+gem 'concurrent-ruby', require: false