diff --git a/sinatra/Gemfile.lock b/sinatra/Gemfile.lock
index 60066d2..59052eb 100644
--- a/sinatra/Gemfile.lock
+++ b/sinatra/Gemfile.lock
@@ -10,7 +10,7 @@ GEM
       racc (~> 1.4)
     nori (2.6.0)
     racc (1.7.1)
-    rack (2.2.6.4)
+    rack (2.2.8.1)
     rack-parser (0.7.0)
       rack
     rack-protection (2.2.3)