diff --git a/flipped-demos/ch04-rails/hw2-onramp/Gemfile.lock b/flipped-demos/ch04-rails/hw2-onramp/Gemfile.lock
index 6ed5dc0..23498f5 100644
--- a/flipped-demos/ch04-rails/hw2-onramp/Gemfile.lock
+++ b/flipped-demos/ch04-rails/hw2-onramp/Gemfile.lock
@@ -117,14 +117,16 @@ GEM
       mime-types-data (~> 3.2015)
     mime-types-data (3.2018.0812)
     mini_mime (1.0.1)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.8.5)
     minitest (5.11.3)
     multi_json (1.13.1)
     multi_test (0.1.2)
-    nokogiri (1.10.1)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.16.3)
+      mini_portile2 (~> 2.8.2)
+      racc (~> 1.4)
     public_suffix (3.0.3)
     puma (3.12.0)
+    racc (1.7.3)
     rack (1.6.11)
     rack-test (0.6.3)
       rack (>= 1.0)