diff --git a/tutorial/Gemfile.lock b/tutorial/Gemfile.lock
index 1dc3aee..51823a4 100644
--- a/tutorial/Gemfile.lock
+++ b/tutorial/Gemfile.lock
@@ -16,7 +16,7 @@ GEM
       multi_json (~> 1.3)
       multi_xml (~> 0.5)
       rack (>= 1.2, < 3)
-    rack (2.2.3)
+    rack (2.2.6.4)
     rack-protection (2.2.4)
       rack
     recursive-open-struct (1.1.3)