diff --git a/Gemfile.lock b/Gemfile.lock
index a131be4..d00327c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -15,7 +15,7 @@ GEM
     coffee-script-source (1.12.2)
     colorator (1.1.0)
     commonmarker (0.23.12)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     csv (3.3.5)
     dnsruby (1.61.7)
       simpleidn (~> 0.1)