diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index 28d12a274..28bf1fd27 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -13,7 +13,7 @@ GEM
       execjs
     coffee-script-source (1.11.1)
     colorator (1.1.0)
-    commonmarker (0.23.7)
+    commonmarker (0.23.9)
     concurrent-ruby (1.1.10)
     dnsruby (1.61.9)
       simpleidn (~> 0.1)