diff --git a/examples/sinatra/Gemfile.lock b/examples/sinatra/Gemfile.lock
index 745bd37..ef80be1 100644
--- a/examples/sinatra/Gemfile.lock
+++ b/examples/sinatra/Gemfile.lock
@@ -10,7 +10,7 @@ GEM
     logger (1.7.0)
     mustermann (3.0.3)
       ruby2_keywords (~> 0.0.1)
-    rack (3.2.0)
+    rack (3.2.5)
     rack-protection (4.1.1)
       base64 (>= 0.1.0)
       logger (>= 1.6.0)