diff --git a/flipped-demos/ch03-saas/ttt/Gemfile.lock b/flipped-demos/ch03-saas/ttt/Gemfile.lock
index 5899db1..24a16e5 100644
--- a/flipped-demos/ch03-saas/ttt/Gemfile.lock
+++ b/flipped-demos/ch03-saas/ttt/Gemfile.lock
@@ -54,15 +54,15 @@ GEM
       mime-types-data (~> 3.2015)
     mime-types-data (3.2022.0105)
     mini_mime (1.1.2)
-    mini_portile2 (2.8.0)
+    mini_portile2 (2.8.5)
     multi_test (1.1.0)
     mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
-    nokogiri (1.13.8)
-      mini_portile2 (~> 2.8.0)
+    nokogiri (1.15.6)
+      mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     public_suffix (5.0.0)
-    racc (1.6.0)
+    racc (1.7.3)
     rack (2.2.4)
     rack-protection (2.2.2)
       rack