diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index 570b1e4..78a6532 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -24,7 +24,7 @@ GEM
     coffee-script-source (1.11.1)
     colorator (1.1.0)
     commonmarker (0.23.12)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     connection_pool (3.0.2)
     dnsruby (1.61.7)
       simpleidn (~> 0.1)