1 files changed, 1 insertions, 0 deletions

diff --git a/Gemfile b/Gemfile
index 260604f570..b9fc37cba2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -45,6 +45,7 @@ end
 
 # Active Support.
 gem 'dalli', '>= 2.2.1'
+gem 'listen', '~> 3.0.4'
 
 # Active Job.
 group :job do