diff --git a/Gemfile b/Gemfile
index 7da382d..764858d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,7 +5,7 @@ gem 'rails', '~> 4.2.1'
 # Use postgresql as the database for Active Record
 gem 'pg'
 # Use SCSS for stylesheets
-gem 'sass-rails', '~> 5.0'
+gem 'sass-rails', '~> 5.0', '>= 5.0.3'
 # Use Uglifier as compressor for JavaScript assets
 gem 'uglifier', '>= 1.3.0'
 # Use CoffeeScript for .coffee assets and views
@@ -14,9 +14,9 @@ gem 'coffee-rails', '~> 4.1.0'
 # gem 'therubyracer', platforms: :ruby
 
 # Use jquery as the JavaScript library
-gem 'jquery-rails'
+gem 'jquery-rails', '>= 4.0.3'
 # Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
-gem 'turbolinks'
+gem 'turbolinks', '>= 2.5.3'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 gem 'jbuilder', '~> 2.0'
 # bundle exec rake doc:rails generates the API under doc/api.
diff --git a/Gemfile.lock b/Gemfile.lock
index 379496d..c0c911d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,140 +1,151 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    actionmailer (4.2.1)
-      actionpack (= 4.2.1)
-      actionview (= 4.2.1)
-      activejob (= 4.2.1)
+    actionmailer (4.2.11.3)
+      actionpack (= 4.2.11.3)
+      actionview (= 4.2.11.3)
+      activejob (= 4.2.11.3)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 1.0, >= 1.0.5)
-    actionpack (4.2.1)
-      actionview (= 4.2.1)
-      activesupport (= 4.2.1)
+    actionpack (4.2.11.3)
+      actionview (= 4.2.11.3)
+      activesupport (= 4.2.11.3)
       rack (~> 1.6)
       rack-test (~> 0.6.2)
       rails-dom-testing (~> 1.0, >= 1.0.5)
-      rails-html-sanitizer (~> 1.0, >= 1.0.1)
-    actionview (4.2.1)
-      activesupport (= 4.2.1)
+      rails-html-sanitizer (~> 1.0, >= 1.0.2)
+    actionview (4.2.11.3)
+      activesupport (= 4.2.11.3)
       builder (~> 3.1)
       erubis (~> 2.7.0)
       rails-dom-testing (~> 1.0, >= 1.0.5)
-      rails-html-sanitizer (~> 1.0, >= 1.0.1)
-    activejob (4.2.1)
-      activesupport (= 4.2.1)
+      rails-html-sanitizer (~> 1.0, >= 1.0.3)
+    activejob (4.2.11.3)
+      activesupport (= 4.2.11.3)
       globalid (>= 0.3.0)
-    activemodel (4.2.1)
-      activesupport (= 4.2.1)
+    activemodel (4.2.11.3)
+      activesupport (= 4.2.11.3)
       builder (~> 3.1)
-    activerecord (4.2.1)
-      activemodel (= 4.2.1)
-      activesupport (= 4.2.1)
+    activerecord (4.2.11.3)
+      activemodel (= 4.2.11.3)
+      activesupport (= 4.2.11.3)
       arel (~> 6.0)
-    activesupport (4.2.1)
+    activesupport (4.2.11.3)
       i18n (~> 0.7)
-      json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    arel (6.0.0)
-    builder (3.2.2)
+    arel (6.0.4)
+    builder (3.2.4)
     byebug (4.0.5)
       columnize (= 0.9.0)
-    coffee-rails (4.1.0)
+    coffee-rails (4.1.1)
       coffee-script (>= 2.2.0)
-      railties (>= 4.0.0, < 5.0)
+      railties (>= 4.0.0, < 5.1.x)
     coffee-script (2.4.1)
       coffee-script-source
       execjs
-    coffee-script-source (1.9.1)
+    coffee-script-source (1.12.2)
     columnize (0.9.0)
+    concurrent-ruby (1.1.8)
+    crass (1.0.6)
     erubis (2.7.0)
-    execjs (2.5.2)
-    globalid (0.3.5)
-      activesupport (>= 4.1.0)
-    hike (1.2.3)
-    i18n (0.7.0)
+    execjs (2.8.1)
+    ffi (1.15.0)
+    globalid (0.4.2)
+      activesupport (>= 4.2.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jbuilder (2.2.12)
       activesupport (>= 3.0.0, < 5)
       multi_json (~> 1.2)
-    jquery-rails (4.0.3)
-      rails-dom-testing (~> 1.0)
+    jquery-rails (4.4.0)
+      rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json (1.8.2)
-    loofah (2.0.1)
+    json (1.8.6)
+    loofah (2.9.1)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
-    mail (2.6.3)
-      mime-types (>= 1.16, < 3)
-    mime-types (2.4.3)
-    mini_portile (0.6.2)
-    minitest (5.5.1)
-    multi_json (1.11.0)
-    nokogiri (1.6.6.2)
-      mini_portile (~> 0.6.0)
+    mail (2.7.1)
+      mini_mime (>= 0.1.1)
+    mini_mime (1.1.0)
+    mini_portile2 (2.5.1)
+    minitest (5.14.4)
+    multi_json (1.15.0)
+    nokogiri (1.11.4)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
     pg (0.18.1)
     puma (2.11.1)
       rack (>= 1.1, < 2.0)
-    rack (1.6.0)
+    racc (1.5.2)
+    rack (1.6.13)
     rack-test (0.6.3)
       rack (>= 1.0)
-    rails (4.2.1)
-      actionmailer (= 4.2.1)
-      actionpack (= 4.2.1)
-      actionview (= 4.2.1)
-      activejob (= 4.2.1)
-      activemodel (= 4.2.1)
-      activerecord (= 4.2.1)
-      activesupport (= 4.2.1)
+    rails (4.2.11.3)
+      actionmailer (= 4.2.11.3)
+      actionpack (= 4.2.11.3)
+      actionview (= 4.2.11.3)
+      activejob (= 4.2.11.3)
+      activemodel (= 4.2.11.3)
+      activerecord (= 4.2.11.3)
+      activesupport (= 4.2.11.3)
       bundler (>= 1.3.0, < 2.0)
-      railties (= 4.2.1)
+      railties (= 4.2.11.3)
       sprockets-rails
-    rails-deprecated_sanitizer (1.0.3)
+    rails-deprecated_sanitizer (1.0.4)
       activesupport (>= 4.2.0.alpha)
-    rails-dom-testing (1.0.6)
-      activesupport (>= 4.2.0.beta, < 5.0)
-      nokogiri (~> 1.6.0)
+    rails-dom-testing (1.0.9)
+      activesupport (>= 4.2.0, < 5.0)
+      nokogiri (~> 1.6)
       rails-deprecated_sanitizer (>= 1.0.1)
-    rails-html-sanitizer (1.0.2)
-      loofah (~> 2.0)
+    rails-html-sanitizer (1.3.0)
+      loofah (~> 2.3)
     rails_12factor (0.0.3)
       rails_serve_static_assets
       rails_stdout_logging
     rails_serve_static_assets (0.0.4)
     rails_stdout_logging (0.0.3)
-    railties (4.2.1)
-      actionpack (= 4.2.1)
-      activesupport (= 4.2.1)
+    railties (4.2.11.3)
+      actionpack (= 4.2.11.3)
+      activesupport (= 4.2.11.3)
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
-    rake (10.4.2)
+    rake (13.0.3)
+    rb-fsevent (0.11.0)
+    rb-inotify (0.10.1)
+      ffi (~> 1.0)
     rdoc (4.2.0)
-    sass (3.4.13)
-    sass-rails (5.0.3)
-      railties (>= 4.0.0, < 5.0)
+    sass (3.7.4)
+      sass-listen (~> 4.0.0)
+    sass-listen (4.0.0)
+      rb-fsevent (~> 0.9, >= 0.9.4)
+      rb-inotify (~> 0.9, >= 0.9.7)
+    sass-rails (5.0.7)
+      railties (>= 4.0.0, < 6)
       sass (~> 3.1)
       sprockets (>= 2.8, < 4.0)
       sprockets-rails (>= 2.0, < 4.0)
-      tilt (~> 1.1)
+      tilt (>= 1.1, < 3)
     sdoc (0.4.1)
       json (~> 1.7, >= 1.7.7)
       rdoc (~> 4.0)
     spring (1.3.4)
-    sprockets (2.12.3)
-      hike (~> 1.2)
-      multi_json (~> 1.0)
-      rack (~> 1.0)
-      tilt (~> 1.1, != 1.3.0)
-    sprockets-rails (2.2.4)
-      actionpack (>= 3.0)
-      activesupport (>= 3.0)
-      sprockets (>= 2.8, < 4.0)
-    thor (0.19.1)
-    thread_safe (0.3.5)
-    tilt (1.4.1)
-    turbolinks (2.5.3)
-      coffee-rails
-    tzinfo (1.2.2)
+    sprockets (3.7.2)
+      concurrent-ruby (~> 1.0)
+      rack (> 1, < 3)
+    sprockets-rails (3.2.2)
+      actionpack (>= 4.0)
+      activesupport (>= 4.0)
+      sprockets (>= 3.0.0)
+    thor (1.1.0)
+    thread_safe (0.3.6)
+    tilt (2.0.10)
+    turbolinks (5.2.1)
+      turbolinks-source (~> 5.2)
+    turbolinks-source (5.2.0)
+    tzinfo (1.2.9)
       thread_safe (~> 0.1)
     uglifier (2.7.1)
       execjs (>= 0.3.0)
@@ -147,16 +158,16 @@ DEPENDENCIES
   byebug
   coffee-rails (~> 4.1.0)
   jbuilder (~> 2.0)
-  jquery-rails
+  jquery-rails (>= 4.0.3)
   pg
   puma
   rails (~> 4.2.1)
   rails_12factor
-  sass-rails (~> 5.0)
+  sass-rails (~> 5.0, >= 5.0.3)
   sdoc (~> 0.4.0)
   spring
-  turbolinks
+  turbolinks (>= 2.5.3)
   uglifier (>= 1.3.0)
 
 BUNDLED WITH
-   1.10.6
+   1.17.3