diff --git a/Gemfile.lock b/Gemfile.lock
index 67cf7a4..df918d9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -30,7 +30,7 @@ GEM
     coffee-script-source (1.11.1)
     colorator (1.1.0)
     commonmarker (0.23.11)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     connection_pool (3.0.2)
     dnsruby (1.61.5)
       simpleidn (~> 0.1)