diff --git a/Gemfile b/Gemfile
index d7275017f5f..bdac00b485a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,6 +7,7 @@ gem 'pkg-config', '~> 1.3'
 
 gem 'puma', '~> 3.11'
 gem 'rails', '~> 5.2.1'
+gem 'thor', '~> 0.20'
 
 gem 'hamlit-rails', '~> 0.2'
 gem 'pg', '~> 1.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index b5129cea455..502d08efe31 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -752,6 +752,7 @@ DEPENDENCIES
   stoplight (~> 2.1.3)
   streamio-ffmpeg (~> 3.0)
   strong_migrations (~> 0.2)
+  thor (~> 0.20)
   tty-command (~> 0.8)
   tty-prompt (~> 0.16)
   twitter-text (~> 1.14)