diff --git a/examples/sinatra/Gemfile.lock b/examples/sinatra/Gemfile.lock
index 2a5111d..f31d6d0 100644
--- a/examples/sinatra/Gemfile.lock
+++ b/examples/sinatra/Gemfile.lock
@@ -37,7 +37,7 @@ GEM
       validate_url
       webfinger (>= 1.0.1)
     public_suffix (4.0.3)
-    rack (2.2.2)
+    rack (2.2.6.2)
     rack-oauth2 (1.14.0)
       activesupport
       attr_required