diff --git a/Gemfile b/Gemfile
index 7105cee..5d10046 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source 'http://rubygems.org'
 
-gem 'rails', '3.0.7'
+gem 'rails', '5.2.4.3'
 
 # Bundle edge Rails instead:
 # gem 'rails', :git => 'git://github.com/rails/rails.git'
diff --git a/Gemfile.lock b/Gemfile.lock
index efa4ecb..5476f10 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,73 +1,148 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    abstract (1.0.0)
-    actionmailer (3.0.7)
-      actionpack (= 3.0.7)
-      mail (~> 2.2.15)
-    actionpack (3.0.7)
-      activemodel (= 3.0.7)
-      activesupport (= 3.0.7)
-      builder (~> 2.1.2)
-      erubis (~> 2.6.6)
-      i18n (~> 0.5.0)
-      rack (~> 1.2.1)
-      rack-mount (~> 0.6.14)
-      rack-test (~> 0.5.7)
-      tzinfo (~> 0.3.23)
-    activemodel (3.0.7)
-      activesupport (= 3.0.7)
-      builder (~> 2.1.2)
-      i18n (~> 0.5.0)
-    activerecord (3.0.7)
-      activemodel (= 3.0.7)
-      activesupport (= 3.0.7)
-      arel (~> 2.0.2)
-      tzinfo (~> 0.3.23)
-    activeresource (3.0.7)
-      activemodel (= 3.0.7)
-      activesupport (= 3.0.7)
-    activesupport (3.0.7)
-    arel (2.0.10)
-    builder (2.1.2)
-    erubis (2.6.6)
-      abstract (>= 1.0.0)
-    i18n (0.5.0)
-    mail (2.2.19)
-      activesupport (>= 2.3.6)
-      i18n (>= 0.4.0)
-      mime-types (~> 1.16)
-      treetop (~> 1.4.8)
-    mime-types (1.16)
-    polyglot (0.3.1)
-    rack (1.2.3)
-    rack-mount (0.6.14)
-      rack (>= 1.0.0)
-    rack-test (0.5.7)
-      rack (>= 1.0)
-    rails (3.0.7)
-      actionmailer (= 3.0.7)
-      actionpack (= 3.0.7)
-      activerecord (= 3.0.7)
-      activeresource (= 3.0.7)
-      activesupport (= 3.0.7)
-      bundler (~> 1.0)
-      railties (= 3.0.7)
-    railties (3.0.7)
-      actionpack (= 3.0.7)
-      activesupport (= 3.0.7)
+    actioncable (5.2.4.3)
+      actionpack (= 5.2.4.3)
+      nio4r (~> 2.0)
+      websocket-driver (>= 0.6.1)
+    actionmailer (5.2.4.3)
+      actionpack (= 5.2.4.3)
+      actionview (= 5.2.4.3)
+      activejob (= 5.2.4.3)
+      mail (~> 2.5, >= 2.5.4)
+      rails-dom-testing (~> 2.0)
+    actionpack (5.2.4.3)
+      actionview (= 5.2.4.3)
+      activesupport (= 5.2.4.3)
+      rack (~> 2.0, >= 2.0.8)
+      rack-test (>= 0.6.3)
+      rails-dom-testing (~> 2.0)
+      rails-html-sanitizer (~> 1.0, >= 1.0.2)
+    actionview (5.2.4.3)
+      activesupport (= 5.2.4.3)
+      builder (~> 3.1)
+      erubi (~> 1.4)
+      rails-dom-testing (~> 2.0)
+      rails-html-sanitizer (~> 1.0, >= 1.0.3)
+    activejob (5.2.4.3)
+      activesupport (= 5.2.4.3)
+      globalid (>= 0.3.6)
+    activemodel (5.2.4.3)
+      activesupport (= 5.2.4.3)
+    activerecord (5.2.4.3)
+      activemodel (= 5.2.4.3)
+      activesupport (= 5.2.4.3)
+      arel (>= 9.0)
+    activestorage (5.2.4.3)
+      actionpack (= 5.2.4.3)
+      activerecord (= 5.2.4.3)
+      marcel (~> 0.3.1)
+    activesupport (5.2.4.3)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 0.7, < 2)
+      minitest (~> 5.1)
+      tzinfo (~> 1.1)
+    arel (9.0.0)
+    builder (3.3.0)
+    concurrent-ruby (1.3.3)
+    crass (1.0.6)
+    date (3.3.4)
+    date (3.3.4-java)
+    erubi (1.13.0)
+    globalid (1.1.0)
+      activesupport (>= 5.0)
+    i18n (1.14.5)
+      concurrent-ruby (~> 1.0)
+    loofah (2.22.0)
+      crass (~> 1.0.2)
+      nokogiri (>= 1.12.0)
+    mail (2.8.1)
+      mini_mime (>= 0.1.1)
+      net-imap
+      net-pop
+      net-smtp
+    marcel (0.3.3)
+      mimemagic (~> 0.3.2)
+    method_source (1.1.0)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
+    mini_mime (1.1.5)
+    minitest (5.24.1)
+    net-imap (0.4.14)
+      date
+      net-protocol
+    net-pop (0.1.2)
+      net-protocol
+    net-protocol (0.2.2)
+      timeout
+    net-smtp (0.5.0)
+      net-protocol
+    nio4r (2.7.3)
+    nio4r (2.7.3-java)
+    nokogiri (1.16.6-java)
+      racc (~> 1.4)
+    nokogiri (1.16.6-x86_64-linux)
+      racc (~> 1.4)
+    racc (1.8.0)
+    racc (1.8.0-java)
+    rack (2.2.9)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rails (5.2.4.3)
+      actioncable (= 5.2.4.3)
+      actionmailer (= 5.2.4.3)
+      actionpack (= 5.2.4.3)
+      actionview (= 5.2.4.3)
+      activejob (= 5.2.4.3)
+      activemodel (= 5.2.4.3)
+      activerecord (= 5.2.4.3)
+      activestorage (= 5.2.4.3)
+      activesupport (= 5.2.4.3)
+      bundler (>= 1.3.0)
+      railties (= 5.2.4.3)
+      sprockets-rails (>= 2.0.0)
+    rails-dom-testing (2.2.0)
+      activesupport (>= 5.0.0)
+      minitest
+      nokogiri (>= 1.6)
+    rails-html-sanitizer (1.6.0)
+      loofah (~> 2.21)
+      nokogiri (~> 1.14)
+    railties (5.2.4.3)
+      actionpack (= 5.2.4.3)
+      activesupport (= 5.2.4.3)
+      method_source
       rake (>= 0.8.7)
-      thor (~> 0.14.4)
-    rake (0.9.0)
+      thor (>= 0.19.0, < 2.0)
+    rake (13.2.1)
+    sprockets (4.2.1)
+      concurrent-ruby (~> 1.0)
+      rack (>= 2.2.4, < 4)
+    sprockets-rails (3.4.2)
+      actionpack (>= 5.2)
+      activesupport (>= 5.2)
+      sprockets (>= 3.0.0)
     sqlite3 (1.3.3)
-    thor (0.14.6)
-    treetop (1.4.9)
-      polyglot (>= 0.3.1)
-    tzinfo (0.3.27)
+    thor (1.3.1)
+    thread_safe (0.3.6)
+    thread_safe (0.3.6-java)
+    timeout (0.4.1)
+    tzinfo (1.2.11)
+      thread_safe (~> 0.1)
+    websocket-driver (0.7.6)
+      websocket-extensions (>= 0.1.0)
+    websocket-driver (0.7.6-java)
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.5)
 
 PLATFORMS
   java
+  x86_64-linux
 
 DEPENDENCIES
-  rails (= 3.0.7)
+  rails (= 5.2.4.3)
   sqlite3
+
+BUNDLED WITH
+   2.5.15