diff --git a/Gemfile.lock b/Gemfile.lock
index 237782e2..c72ea408 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -117,7 +117,7 @@ GEM
       execjs
     coffee-script-source (1.12.2)
     colorize (1.1.0)
-    concurrent-ruby (1.3.5)
+    concurrent-ruby (1.3.7)
     connection_pool (2.5.3)
     crass (1.0.6)
     database_cleaner-active_record (2.2.2)