diff --git a/flipped-demos/ch04-rails/rails_intro_homework_warmup/rottenpotatoes/Gemfile.lock b/flipped-demos/ch04-rails/rails_intro_homework_warmup/rottenpotatoes/Gemfile.lock
index a884aee..aaa41c8 100644
--- a/flipped-demos/ch04-rails/rails_intro_homework_warmup/rottenpotatoes/Gemfile.lock
+++ b/flipped-demos/ch04-rails/rails_intro_homework_warmup/rottenpotatoes/Gemfile.lock
@@ -38,7 +38,7 @@ GEM
     arel (6.0.4)
     binding_of_caller (0.8.0)
       debug_inspector (>= 0.0.1)
-    builder (3.2.3)
+    builder (3.2.4)
     byebug (10.0.2)
     coffee-rails (4.1.1)
       coffee-script (>= 2.2.0)
@@ -47,8 +47,8 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.1.4)
-    crass (1.0.4)
+    concurrent-ruby (1.2.2)
+    crass (1.0.6)
     debug_inspector (0.0.3)
     erubis (2.7.0)
     execjs (2.7.0)
@@ -60,23 +60,25 @@ GEM
     jbuilder (2.8.0)
       activesupport (>= 4.2.0)
       multi_json (>= 1.2)
-    jquery-rails (4.3.3)
+    jquery-rails (4.4.0)
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
     json (1.8.6)
-    loofah (2.2.3)
+    loofah (2.21.3)
       crass (~> 1.0.2)
-      nokogiri (>= 1.5.9)
+      nokogiri (>= 1.12.0)
     mail (2.7.1)
       mini_mime (>= 0.1.1)
     mini_mime (1.0.1)
-    mini_portile2 (2.4.0)
-    minitest (5.11.3)
+    mini_portile2 (2.8.2)
+    minitest (5.18.1)
     multi_json (1.13.1)
-    nokogiri (1.10.1)
-      mini_portile2 (~> 2.4.0)
-    rack (1.6.11)
+    nokogiri (1.15.2)
+      mini_portile2 (~> 2.8.2)
+      racc (~> 1.4)
+    racc (1.7.1)
+    rack (1.6.13)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.9)
@@ -90,20 +92,21 @@ GEM
       bundler (>= 1.3.0, < 2.0)
       railties (= 4.2.9)
       sprockets-rails
-    rails-deprecated_sanitizer (1.0.3)
+    rails-deprecated_sanitizer (1.0.4)
       activesupport (>= 4.2.0.alpha)
     rails-dom-testing (1.0.9)
       activesupport (>= 4.2.0, < 5.0)
       nokogiri (~> 1.6)
       rails-deprecated_sanitizer (>= 1.0.1)
-    rails-html-sanitizer (1.0.4)
-      loofah (~> 2.2, >= 2.2.2)
+    rails-html-sanitizer (1.6.0)
+      loofah (~> 2.21)
+      nokogiri (~> 1.14)
     railties (4.2.9)
       actionpack (= 4.2.9)
       activesupport (= 4.2.9)
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
-    rake (12.3.2)
+    rake (13.0.6)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)
       ffi (~> 1.0)
@@ -132,13 +135,13 @@ GEM
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
     sqlite3 (1.3.11)
-    thor (0.20.3)
+    thor (1.2.2)
     thread_safe (0.3.6)
     tilt (2.0.9)
     turbolinks (5.2.0)
       turbolinks-source (~> 5.2)
     turbolinks-source (5.2.0)
-    tzinfo (1.2.5)
+    tzinfo (1.2.11)
       thread_safe (~> 0.1)
     uglifier (4.1.20)
       execjs (>= 0.3.0, < 3)