diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index 9a3e8201..e467564e 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -25,7 +25,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     contracts (0.16.1)
     dotenv (3.2.0)
     drb (2.2.3)