diff --git a/Gemfile b/Gemfile
index b2d7199..b8cb74c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -25,7 +25,7 @@ group :doc do
 end
 
 group :production do
-  gem 'mysql2', '~> 0.3.18' # Database
+  gem 'mysql2', '~> 0.4.10' # Database
 end
 
 group :test do
@@ -85,4 +85,4 @@ gem 'delayed_job_active_record'
 gem 'httparty', '0.13.7'
 
 # windows support (linux timezone directory is used in the project)
-gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw]
\ No newline at end of file
+gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw]
diff --git a/Gemfile.lock b/Gemfile.lock
index 016558d..07f8f77 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -35,17 +35,18 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.4.0)
-    airbrake (4.3.5)
+    addressable (2.5.2)
+      public_suffix (>= 2.0.2, < 4.0)
+    airbrake (4.3.8)
       builder
       multi_json
-    airbrussh (1.3.0)
+    airbrussh (1.3.1)
       sshkit (>= 1.6.1, != 1.7.0)
-    annotate (2.7.0)
+    annotate (2.7.4)
       activerecord (>= 3.2, < 6.0)
-      rake (~> 10.4)
+      rake (>= 10.4, < 13.0)
     arel (6.0.4)
-    bcrypt (3.1.10)
+    bcrypt (3.1.12)
     bootstrap-sass (3.2.0.0)
       sass (~> 3.2)
     bootstrap-switch-rails (3.3.3)
@@ -59,50 +60,47 @@ GEM
       i18n
       rake (>= 10.0.0)
       sshkit (>= 1.9.0)
-    capistrano-bundler (1.1.4)
+    capistrano-bundler (1.5.0)
       capistrano (~> 3.1)
-      sshkit (~> 1.2)
     capistrano-passenger (0.2.0)
       capistrano (~> 3.0)
-    capistrano-rails (1.1.6)
+    capistrano-rails (1.4.0)
       capistrano (~> 3.1)
       capistrano-bundler (~> 1.1)
-    capistrano-rbenv (2.0.4)
+    capistrano-rbenv (2.1.4)
       capistrano (~> 3.1)
       sshkit (~> 1.3)
     capistrano-rvm (0.1.2)
       capistrano (~> 3.0)
       sshkit (~> 1.2)
-    chunky_png (1.3.5)
-    climate_control (0.0.3)
-      activesupport (>= 3.0)
+    chunky_png (1.3.11)
+    climate_control (0.2.0)
     cocaine (0.5.8)
       climate_control (>= 0.0.3, < 1.0)
-    codeclimate-test-reporter (0.4.8)
-      simplecov (>= 0.7.1, < 1.0.0)
-    coffee-rails (4.1.1)
+    codeclimate-test-reporter (1.0.9)
+      simplecov (<= 0.13)
+    coffee-rails (4.2.2)
       coffee-script (>= 2.2.0)
-      railties (>= 4.0.0, < 5.1.x)
+      railties (>= 4.0.0)
     coffee-script (2.4.1)
       coffee-script-source
       execjs
-    coffee-script-source (1.10.0)
-    concurrent-ruby (1.0.5)
-    coveralls (0.8.10)
-      json (~> 1.8)
-      rest-client (>= 1.6.8, < 2)
-      simplecov (~> 0.11.0)
+    coffee-script-source (1.12.2)
+    concurrent-ruby (1.1.4)
+    coveralls (0.8.19)
+      json (>= 1.8, < 3)
+      simplecov (~> 0.12.0)
       term-ansicolor (~> 1.3)
       thor (~> 0.19.1)
-      tins (~> 1.6.0)
+      tins (~> 1.6)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
     crass (1.0.4)
     daemons (1.2.3)
-    delayed_job (4.1.1)
-      activesupport (>= 3.0, < 5.0)
-    delayed_job_active_record (4.1.0)
-      activerecord (>= 3.0, < 5)
+    delayed_job (4.1.5)
+      activesupport (>= 3.0, < 5.3)
+    delayed_job_active_record (4.1.3)
+      activerecord (>= 3.0, < 5.3)
       delayed_job (>= 3.0, < 5)
     devise (3.5.6)
       bcrypt (~> 3.0)
@@ -111,12 +109,10 @@ GEM
       responders
       thread_safe (~> 0.1)
       warden (~> 1.2.3)
-    diff-lcs (1.2.5)
+    diff-lcs (1.3)
     docile (1.1.5)
-    domain_name (0.5.20160128)
-      unf (>= 0.0.5, < 1.0.0)
     erubis (2.7.0)
-    execjs (2.6.0)
+    execjs (2.7.0)
     factory_girl (4.5.0)
       activesupport (>= 3.0.0)
     factory_girl_rails (4.6.0)
@@ -124,7 +120,7 @@ GEM
       railties (>= 3.0.0)
     faker (1.4.2)
       i18n (~> 0.5)
-    faraday (0.9.2)
+    faraday (0.15.4)
       multipart-post (>= 1.2, < 3)
     friendly_id (5.1.0)
       activerecord (>= 4.0.0)
@@ -138,16 +134,14 @@ GEM
       haml (>= 4.0.6, < 5.0)
       html2haml (>= 1.0.1)
       railties (>= 4.0.1)
-    hashdiff (0.2.3)
-    hashie (3.4.3)
+    hashdiff (0.3.7)
+    hashie (3.6.0)
     hike (1.2.3)
-    html2haml (2.0.0)
+    html2haml (2.2.0)
       erubis (~> 2.7.0)
-      haml (~> 4.0.0)
-      nokogiri (~> 1.6.0)
+      haml (>= 4.0, < 6)
+      nokogiri (>= 1.6.0)
       ruby_parser (~> 3.5)
-    http-cookie (1.0.2)
-      domain_name (~> 0.5)
     httparty (0.13.7)
       json (~> 1.8)
       multi_xml (>= 0.5.2)
@@ -160,36 +154,37 @@ GEM
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
     json (1.8.6)
-    jwt (1.5.1)
-    loofah (2.2.2)
+    jwt (2.1.0)
+    loofah (2.2.3)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
-    mail (2.7.0)
+    mail (2.7.1)
       mini_mime (>= 0.1.1)
-    mime-types (2.99.3)
+    mime-types (3.2.2)
+      mime-types-data (~> 3.2015)
+    mime-types-data (3.2018.0812)
     mimemagic (0.3.0)
-    mini_mime (1.0.0)
-    mini_portile2 (2.1.0)
+    mini_mime (1.0.1)
+    mini_portile2 (2.4.0)
     minitest (5.11.3)
     multi_json (1.13.1)
-    multi_xml (0.5.5)
+    multi_xml (0.6.0)
     multipart-post (2.0.0)
-    mysql2 (0.3.20)
+    mysql2 (0.4.10)
     net-scp (1.2.1)
       net-ssh (>= 2.6.5)
-    net-ssh (5.0.2)
-    netrc (0.11.0)
-    nokogiri (1.6.8.1)
-      mini_portile2 (~> 2.1.0)
-    oauth2 (1.1.0)
-      faraday (>= 0.8, < 0.10)
-      jwt (~> 1.0, < 1.5.2)
+    net-ssh (5.1.0)
+    nokogiri (1.9.1)
+      mini_portile2 (~> 2.4.0)
+    oauth2 (1.4.1)
+      faraday (>= 0.8, < 0.16.0)
+      jwt (>= 1.0, < 3.0)
       multi_json (~> 1.3)
       multi_xml (~> 0.5)
       rack (>= 1.2, < 3)
-    omniauth (1.3.1)
-      hashie (>= 1.2, < 4)
-      rack (>= 1.0, < 3)
+    omniauth (1.9.0)
+      hashie (>= 3.4.6, < 3.7.0)
+      rack (>= 1.6.2, < 3)
     omniauth-oauth2 (1.3.1)
       oauth2 (~> 1.0)
       omniauth (~> 1.2)
@@ -200,7 +195,8 @@ GEM
       cocaine (~> 0.5.5)
       mime-types
       mimemagic (= 0.3.0)
-    rack (1.6.10)
+    public_suffix (3.0.3)
+    rack (1.6.11)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.10)
@@ -227,34 +223,30 @@ GEM
       activesupport (= 4.2.10)
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
-    rake (10.5.0)
-    rdoc (4.2.1)
-      json (~> 1.4)
-    responders (2.1.1)
-      railties (>= 4.2.0, < 5.1)
-    rest-client (1.8.0)
-      http-cookie (>= 1.0.2, < 2.0)
-      mime-types (>= 1.16, < 3.0)
-      netrc (~> 0.7)
-    rspec-core (3.4.2)
-      rspec-support (~> 3.4.0)
-    rspec-expectations (3.4.0)
+    rake (12.3.2)
+    rdoc (4.3.0)
+    responders (2.4.0)
+      actionpack (>= 4.2.0, < 5.3)
+      railties (>= 4.2.0, < 5.3)
+    rspec-core (3.8.0)
+      rspec-support (~> 3.8.0)
+    rspec-expectations (3.8.2)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.4.0)
-    rspec-mocks (3.4.1)
+      rspec-support (~> 3.8.0)
+    rspec-mocks (3.8.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.4.0)
-    rspec-rails (3.4.2)
-      actionpack (>= 3.0, < 4.3)
-      activesupport (>= 3.0, < 4.3)
-      railties (>= 3.0, < 4.3)
-      rspec-core (~> 3.4.0)
-      rspec-expectations (~> 3.4.0)
-      rspec-mocks (~> 3.4.0)
-      rspec-support (~> 3.4.0)
-    rspec-support (3.4.1)
-    ruby_parser (3.7.3)
-      sexp_processor (~> 4.1)
+      rspec-support (~> 3.8.0)
+    rspec-rails (3.8.1)
+      actionpack (>= 3.0)
+      activesupport (>= 3.0)
+      railties (>= 3.0)
+      rspec-core (~> 3.8.0)
+      rspec-expectations (~> 3.8.0)
+      rspec-mocks (~> 3.8.0)
+      rspec-support (~> 3.8.0)
+    rspec-support (3.8.0)
+    ruby_parser (3.12.0)
+      sexp_processor (~> 4.9)
     safe_yaml (1.0.4)
     sass (3.2.19)
     sass-rails (4.0.5)
@@ -262,15 +254,15 @@ GEM
       sass (~> 3.2.2)
       sprockets (~> 2.8, < 3.0)
       sprockets-rails (~> 2.0)
-    sdoc (0.4.1)
+    sdoc (0.4.2)
       json (~> 1.7, >= 1.7.7)
       rdoc (~> 4.0)
-    sexp_processor (4.6.1)
-    simplecov (0.11.2)
+    sexp_processor (4.11.0)
+    simplecov (0.12.0)
       docile (~> 1.1.0)
-      json (~> 1.8)
+      json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
-    simplecov-html (0.10.0)
+    simplecov-html (0.10.2)
     spring (1.6.2)
     sprockets (2.12.5)
       hike (~> 1.2)
@@ -282,28 +274,24 @@ GEM
       activesupport (>= 3.0)
       sprockets (>= 2.8, < 4.0)
     sqlite3 (1.3.11)
-    sshkit (1.17.0)
+    sshkit (1.18.0)
       net-scp (>= 1.1.2)
       net-ssh (>= 2.8.0)
-    term-ansicolor (1.3.2)
+    term-ansicolor (1.7.0)
       tins (~> 1.0)
     thor (0.19.4)
     thread_safe (0.3.6)
     tilt (1.4.1)
-    tins (1.6.0)
+    tins (1.20.2)
     turbolinks (2.5.3)
       coffee-rails
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    uglifier (2.7.2)
-      execjs (>= 0.3.0)
-      json (>= 1.8.0)
-    unf (0.1.4)
-      unf_ext
-    unf_ext (0.0.7.2)
-    warden (1.2.6)
+    uglifier (4.1.20)
+      execjs (>= 0.3.0, < 3)
+    warden (1.2.7)
       rack (>= 1.0)
-    webmock (1.22.6)
+    webmock (3.5.1)
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
       hashdiff
@@ -338,7 +326,7 @@ DEPENDENCIES
   httparty (= 0.13.7)
   identicon (= 0.0.5)
   jquery-rails (= 4.1.0)
-  mysql2 (~> 0.3.18)
+  mysql2 (~> 0.4.10)
   omniauth-oauth2 (= 1.3.1)
   paperclip (= 4.3.4)
   rails (= 4.2.10)
@@ -354,4 +342,4 @@ DEPENDENCIES
   will_paginate (= 3.0.7)
 
 BUNDLED WITH
-   1.17.2
+   1.17.3