diff --git a/Gemfile.lock b/Gemfile.lock
index a0562676..10b28f60 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -118,7 +118,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     connection_pool (2.5.5)
     crass (1.0.6)
     date (3.4.1)