diff --git a/hooks/ruby/configuring-your-server/Gemfile.lock b/hooks/ruby/configuring-your-server/Gemfile.lock
index 52551b5d7..26c005b8a 100644
--- a/hooks/ruby/configuring-your-server/Gemfile.lock
+++ b/hooks/ruby/configuring-your-server/Gemfile.lock
@@ -4,7 +4,7 @@ GEM
     json (2.3.0)
     mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
-    rack (2.2.6.4)
+    rack (2.2.8.1)
     rack-protection (2.2.3)
       rack
     ruby2_keywords (0.0.5)