diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index 5443718..6005b24 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -20,7 +20,7 @@ GEM
     bigdecimal (4.1.2)
     cgi (0.5.1)
     colorator (1.1.0)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     connection_pool (3.0.2)
     csv (3.3.5)
     drb (2.2.3)