diff --git a/auth_server_example/Gemfile.lock b/auth_server_example/Gemfile.lock
index 0576691..5b457f6 100644
--- a/auth_server_example/Gemfile.lock
+++ b/auth_server_example/Gemfile.lock
@@ -2,7 +2,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     mustermann (1.0.3)
-    rack (2.0.6)
+    rack (2.2.8.1)
     rack-protection (2.0.5)
       rack
     sinatra (2.0.5)