diff --git a/rails_projects/first_app/Gemfile.lock b/rails_projects/first_app/Gemfile.lock
index 1bfb908..c141919 100644
--- a/rails_projects/first_app/Gemfile.lock
+++ b/rails_projects/first_app/Gemfile.lock
@@ -34,10 +34,12 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.9.1.1)
+    concurrent-ruby (1.1.9)
     erubis (2.7.0)
     execjs (2.5.2)
     hike (1.2.3)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jbuilder (1.0.2)
       activesupport (>= 3.0.0)
     jquery-rails (3.0.4)