diff --git a/ch14/students03/Gemfile b/ch14/students03/Gemfile
index 540b314..8a0e032 100644
--- a/ch14/students03/Gemfile
+++ b/ch14/students03/Gemfile
@@ -1,6 +1,7 @@
 source 'https://rubygems.org'
 
-gem 'rails', github: "rails/rails"
+# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
+gem 'rails', '~> 5.0.0'
 gem 'sprockets-rails', github: "rails/sprockets-rails"
 gem 'sprockets', github: "rails/sprockets"
 gem 'sass-rails', github: "rails/sass-rails"
diff --git a/ch14/students03/Gemfile.lock b/ch14/students03/Gemfile.lock
index 28b45bc..d57333d 100644
--- a/ch14/students03/Gemfile.lock
+++ b/ch14/students03/Gemfile.lock
@@ -1,180 +1,175 @@
 GIT
   remote: git://github.com/rack/rack.git
-  revision: 2ac599551d6147184321c42f40a0ab3241499b08
+  revision: 25a549883b85fb33970b4a1530a365c0c9e51f95
   specs:
-    rack (2.0.0.alpha)
-      json
+    rack (2.0.1)
 
 GIT
   remote: git://github.com/rails/arel.git
-  revision: ea2d50706a5f8215ff2346fa562423700b2d2b6e
+  revision: 6d2254ae4ac5a361c041783d742292acfa58e363
   specs:
-    arel (7.0.0)
+    arel (7.0.1.pre)
 
 GIT
   remote: git://github.com/rails/coffee-rails.git
-  revision: fb0e42191e9d2fc0f9a56f0d2b3049f404c9eb97
+  revision: 572d74dc6b4b65eeb610d7edc9978cce8901e2ca
   specs:
-    coffee-rails (4.1.1)
+    coffee-rails (4.2.1)
       coffee-script (>= 2.2.0)
-      railties (>= 4.0.0, < 5.1.x)
-
-GIT
-  remote: git://github.com/rails/rails.git
-  revision: a0d6209479bee220b43061d8ffa6a8d732ffd20d
-  specs:
-    actioncable (5.0.0.beta3)
-      actionpack (= 5.0.0.beta3)
-      nio4r (~> 1.2)
-      websocket-driver (~> 0.6.1)
-    actionmailer (5.0.0.beta3)
-      actionpack (= 5.0.0.beta3)
-      actionview (= 5.0.0.beta3)
-      activejob (= 5.0.0.beta3)
-      mail (~> 2.5, >= 2.5.4)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
-    actionpack (5.0.0.beta3)
-      actionview (= 5.0.0.beta3)
-      activesupport (= 5.0.0.beta3)
-      rack (~> 2.x)
-      rack-test (~> 0.6.3)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
-      rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.0.0.beta3)
-      activesupport (= 5.0.0.beta3)
-      builder (~> 3.1)
-      erubis (~> 2.7.0)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
-      rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    activejob (5.0.0.beta3)
-      activesupport (= 5.0.0.beta3)
-      globalid (>= 0.3.6)
-    activemodel (5.0.0.beta3)
-      activesupport (= 5.0.0.beta3)
-    activerecord (5.0.0.beta3)
-      activemodel (= 5.0.0.beta3)
-      activesupport (= 5.0.0.beta3)
-      arel (~> 7.0)
-    activesupport (5.0.0.beta3)
-      concurrent-ruby (~> 1.0)
-      i18n (~> 0.7)
-      minitest (~> 5.1)
-      tzinfo (~> 1.1)
-    rails (5.0.0.beta3)
-      actioncable (= 5.0.0.beta3)
-      actionmailer (= 5.0.0.beta3)
-      actionpack (= 5.0.0.beta3)
-      actionview (= 5.0.0.beta3)
-      activejob (= 5.0.0.beta3)
-      activemodel (= 5.0.0.beta3)
-      activerecord (= 5.0.0.beta3)
-      activesupport (= 5.0.0.beta3)
-      bundler (>= 1.3.0, < 2.0)
-      railties (= 5.0.0.beta3)
-      sprockets-rails (>= 2.0.0)
-    railties (5.0.0.beta3)
-      actionpack (= 5.0.0.beta3)
-      activesupport (= 5.0.0.beta3)
-      method_source
-      rake (>= 0.8.7)
-      thor (>= 0.18.1, < 2.0)
+      railties (>= 4.0.0, < 5.2.x)
 
 GIT
   remote: git://github.com/rails/sass-rails.git
-  revision: 6e4eee736bcbfa5b2962467673c7a51abf434c67
+  revision: dfbcc6a53653d8908007e26324a0f299f026ec4f
   specs:
-    sass-rails (6.0.0)
-      railties (>= 4.0.0, < 5.0)
+    sass-rails (6.0.0.beta1)
+      railties (>= 4.0.0, < 5.1)
       sass (~> 3.4)
-      sprockets (>= 4.0)
+      sprockets (~> 4.x)
       sprockets-rails (< 4.0)
 
 GIT
   remote: git://github.com/rails/sprockets-rails.git
-  revision: 419958f24fb4ce2d4c86f68f87c5a76767f3aa88
+  revision: df5950017d7f2aa6fcbfa3949edfef85c35c28c7
   specs:
-    sprockets-rails (3.0.0)
+    sprockets-rails (3.1.1)
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
 
 GIT
   remote: git://github.com/rails/sprockets.git
-  revision: 47ac6ad00408bd1636e522e8977324e5138e74a4
+  revision: 98e9823150b1a5790c56874db6d342a5f6af8b91
   specs:
-    sprockets (4.0.0)
+    sprockets (4.0.0.beta2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
 
 GIT
   remote: git://github.com/rails/web-console.git
-  revision: 685962ebe4874a12c1e472807917b66867f42636
+  revision: 04a941c001e87711a82524beaea9089a8635a323
   specs:
-    web-console (3.0.0)
-      activemodel (>= 4.2)
+    web-console (3.3.1)
+      actionview (>= 5.0)
+      activemodel (>= 5.0)
       debug_inspector
-      railties (>= 4.2)
+      railties (>= 5.0)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    bcrypt (3.1.10)
+    actioncable (5.0.0)
+      actionpack (= 5.0.0)
+      nio4r (~> 1.2)
+      websocket-driver (~> 0.6.1)
+    actionmailer (5.0.0)
+      actionpack (= 5.0.0)
+      actionview (= 5.0.0)
+      activejob (= 5.0.0)
+      mail (~> 2.5, >= 2.5.4)
+      rails-dom-testing (~> 2.0)
+    actionpack (5.0.0)
+      actionview (= 5.0.0)
+      activesupport (= 5.0.0)
+      rack (~> 2.0)
+      rack-test (~> 0.6.3)
+      rails-dom-testing (~> 2.0)
+      rails-html-sanitizer (~> 1.0, >= 1.0.2)
+    actionview (5.0.0)
+      activesupport (= 5.0.0)
+      builder (~> 3.1)
+      erubis (~> 2.7.0)
+      rails-dom-testing (~> 2.0)
+      rails-html-sanitizer (~> 1.0, >= 1.0.2)
+    activejob (5.0.0)
+      activesupport (= 5.0.0)
+      globalid (>= 0.3.6)
+    activemodel (5.0.0)
+      activesupport (= 5.0.0)
+    activerecord (5.0.0)
+      activemodel (= 5.0.0)
+      activesupport (= 5.0.0)
+      arel (~> 7.0)
+    activesupport (5.0.0)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (~> 0.7)
+      minitest (~> 5.1)
+      tzinfo (~> 1.1)
+    bcrypt (3.1.11)
     builder (3.2.2)
-    byebug (8.2.1)
+    byebug (9.0.5)
     coffee-script (2.4.1)
       coffee-script-source
       execjs
     coffee-script-source (1.10.0)
-    concurrent-ruby (1.0.0)
+    concurrent-ruby (1.0.2)
     debug_inspector (0.0.2)
     erubis (2.7.0)
-    execjs (2.6.0)
+    execjs (2.7.0)
     globalid (0.3.6)
       activesupport (>= 4.1.0)
     i18n (0.7.0)
-    jbuilder (2.3.2)
-      activesupport (>= 3.0.0, < 5)
+    jbuilder (2.5.0)
+      activesupport (>= 3.0.0, < 5.1)
       multi_json (~> 1.2)
-    jquery-rails (4.0.5)
-      rails-dom-testing (~> 1.0)
+    jquery-rails (4.1.1)
+      rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json (1.8.3)
     loofah (2.0.3)
       nokogiri (>= 1.5.9)
-    mail (2.6.3)
-      mime-types (>= 1.16, < 3)
+    mail (2.6.4)
+      mime-types (>= 1.16, < 4)
     method_source (0.8.2)
-    mime-types (2.99.1)
-    mini_portile2 (2.0.0)
-    minitest (5.8.4)
-    multi_json (1.11.2)
+    mime-types (3.1)
+      mime-types-data (~> 3.2015)
+    mime-types-data (3.2016.0521)
+    mini_portile2 (2.1.0)
+    minitest (5.9.0)
+    multi_json (1.12.1)
     nio4r (1.2.1)
-    nokogiri (1.6.7.1)
-      mini_portile2 (~> 2.0.0.rc2)
+    nokogiri (1.6.8)
+      mini_portile2 (~> 2.1.0)
+      pkg-config (~> 1.1.7)
+    pkg-config (1.1.7)
     rack-test (0.6.3)
       rack (>= 1.0)
-    rails-deprecated_sanitizer (1.0.3)
-      activesupport (>= 4.2.0.alpha)
-    rails-dom-testing (1.0.7)
-      activesupport (>= 4.2.0.beta, < 5.0)
+    rails (5.0.0)
+      actioncable (= 5.0.0)
+      actionmailer (= 5.0.0)
+      actionpack (= 5.0.0)
+      actionview (= 5.0.0)
+      activejob (= 5.0.0)
+      activemodel (= 5.0.0)
+      activerecord (= 5.0.0)
+      activesupport (= 5.0.0)
+      bundler (>= 1.3.0, < 2.0)
+      railties (= 5.0.0)
+      sprockets-rails (>= 2.0.0)
+    rails-dom-testing (2.0.1)
+      activesupport (>= 4.2.0, < 6.0)
       nokogiri (~> 1.6.0)
-      rails-deprecated_sanitizer (>= 1.0.1)
     rails-html-sanitizer (1.0.3)
       loofah (~> 2.0)
-    rake (10.5.0)
-    sass (3.4.20)
+    railties (5.0.0)
+      actionpack (= 5.0.0)
+      activesupport (= 5.0.0)
+      method_source
+      rake (>= 0.8.7)
+      thor (>= 0.18.1, < 2.0)
+    rake (11.2.2)
+    sass (3.4.22)
     sqlite3 (1.3.11)
     thor (0.19.1)
     thread_safe (0.3.5)
-    turbolinks (2.5.3)
-      coffee-rails
+    turbolinks (5.0.0)
+      turbolinks-source (~> 5)
+    turbolinks-source (5.0.0)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
-    uglifier (2.7.2)
-      execjs (>= 0.3.0)
-      json (>= 1.8.0)
-    websocket-driver (0.6.3)
+    uglifier (3.0.0)
+      execjs (>= 0.3.0, < 3)
+    websocket-driver (0.6.4)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.2)
 
@@ -189,7 +184,7 @@ DEPENDENCIES
   jbuilder (~> 2.0)
   jquery-rails
   rack!
-  rails!
+  rails (~> 5.0.0)
   sass-rails!
   sprockets!
   sprockets-rails!