diff --git a/Gemfile.lock b/Gemfile.lock
index 8321d42..0e36917 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -71,7 +71,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     connection_pool (3.0.2)
     contracts (0.17.3)
     cuprite (0.17)