diff --git a/Gemfile.lock b/Gemfile.lock
index e39ab31..64db03f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -107,7 +107,7 @@ GEM
       activerecord (>= 3.0.0)
       activesupport (>= 3.0.0)
     cancancan (3.6.1)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     connection_pool (3.0.2)
     crass (1.0.6)
     database_cleaner-active_record (2.2.2)