diff --git a/web/documentserver-example/ruby/Gemfile.lock b/web/documentserver-example/ruby/Gemfile.lock
index 857fc2fb..37a08b12 100644
--- a/web/documentserver-example/ruby/Gemfile.lock
+++ b/web/documentserver-example/ruby/Gemfile.lock
@@ -146,7 +146,7 @@ GEM
     psych (5.1.2)
       stringio
     racc (1.8.1)
-    rack (2.2.10)
+    rack (2.2.11)
     rack-cors (2.0.2)
       rack (>= 2.0.0)
     rack-test (2.1.0)