diff --git a/rails_app/Gemfile.lock b/rails_app/Gemfile.lock
index c3b4c66..ed841fa 100644
--- a/rails_app/Gemfile.lock
+++ b/rails_app/Gemfile.lock
@@ -77,7 +77,7 @@ GEM
     benchmark (0.5.0)
     bigdecimal (4.0.1)
     builder (3.3.0)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     connection_pool (3.0.2)
     crass (1.0.6)
     date (3.4.1)