diff --git a/Gemfile b/Gemfile
index f1cb708..fb1d854 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,13 +6,13 @@ gem 'unicorn'
 
 gem 'mysql2'
 
-gem 'devise', '~> 3.2.4'
+gem 'devise', '~> 3.3.0'
 gem 'rails_admin'
 
 gem 'rails_locale_detection', '~> 2.0.0.pre'
 
 gem 'sass-rails', '~> 4.0.0'
-gem 'bootstrap-sass', '~> 3.1.1.1'
+gem 'bootstrap-sass', '~> 3.2.0'
 gem 'uglifier', '>= 1.3.0'
 gem 'coffee-rails', '~> 4.0.0'
 gem 'jquery-rails'
@@ -23,8 +23,8 @@ gem 'paperclip', '~> 4.1'
 
 group :development, :test do
   gem 'rspec-rails', '~> 3.0.1'
-  gem 'capybara', '~> 2.3.0'
+  gem 'capybara', '~> 2.4.1'
 
-  gem 'fuubar', '~> 1.3.3'
+  gem 'fuubar', '~> 2.0.0'
   gem 'rspec-instafail', '~> 0.2.4'
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index 1c91264..fe1dd5d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,27 +1,27 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    actionmailer (4.1.4)
-      actionpack (= 4.1.4)
-      actionview (= 4.1.4)
+    actionmailer (4.1.5)
+      actionpack (= 4.1.5)
+      actionview (= 4.1.5)
       mail (~> 2.5.4)
-    actionpack (4.1.4)
-      actionview (= 4.1.4)
-      activesupport (= 4.1.4)
+    actionpack (4.1.5)
+      actionview (= 4.1.5)
+      activesupport (= 4.1.5)
       rack (~> 1.5.2)
       rack-test (~> 0.6.2)
-    actionview (4.1.4)
-      activesupport (= 4.1.4)
+    actionview (4.1.5)
+      activesupport (= 4.1.5)
       builder (~> 3.1)
       erubis (~> 2.7.0)
-    activemodel (4.1.4)
-      activesupport (= 4.1.4)
+    activemodel (4.1.5)
+      activesupport (= 4.1.5)
       builder (~> 3.1)
-    activerecord (4.1.4)
-      activemodel (= 4.1.4)
-      activesupport (= 4.1.4)
+    activerecord (4.1.5)
+      activemodel (= 4.1.5)
+      activesupport (= 4.1.5)
       arel (~> 5.0.0)
-    activesupport (4.1.4)
+    activesupport (4.1.5)
       i18n (~> 0.6, >= 0.6.9)
       json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
@@ -29,10 +29,10 @@ GEM
       tzinfo (~> 1.1)
     arel (5.0.1.20140414130214)
     bcrypt (3.1.7)
-    bootstrap-sass (3.1.1.1)
+    bootstrap-sass (3.2.0.1)
       sass (~> 3.2)
     builder (3.2.2)
-    capybara (2.3.0)
+    capybara (2.4.1)
       mime-types (>= 1.16)
       nokogiri (>= 1.3.3)
       rack (>= 1.0.0)
@@ -45,11 +45,11 @@ GEM
     coffee-rails (4.0.1)
       coffee-script (>= 2.2.0)
       railties (>= 4.0.0, < 5.0)
-    coffee-script (2.2.0)
+    coffee-script (2.3.0)
       coffee-script-source
       execjs
-    coffee-script-source (1.7.0)
-    devise (3.2.4)
+    coffee-script-source (1.7.1)
+    devise (3.3.0)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
       railties (>= 3.2.6, < 5)
@@ -57,24 +57,24 @@ GEM
       warden (~> 1.2.3)
     diff-lcs (1.2.5)
     erubis (2.7.0)
-    execjs (2.1.0)
+    execjs (2.2.1)
     font-awesome-rails (4.1.0.0)
       railties (>= 3.2, < 5.0)
-    fuubar (1.3.3)
-      rspec (>= 2.14.0, < 3.1.0)
+    fuubar (2.0.0)
+      rspec (~> 3.0)
       ruby-progressbar (~> 1.4)
     haml (4.0.5)
       tilt
     hike (1.2.3)
     http_accept_language (1.0.2)
-    i18n (0.6.9)
-    jquery-rails (3.1.0)
+    i18n (0.6.11)
+    jquery-rails (3.1.1)
       railties (>= 3.0, < 5.0)
       thor (>= 0.14, < 2.0)
     jquery-ui-rails (4.2.1)
       railties (>= 3.2.16)
     json (1.8.1)
-    kaminari (0.15.1)
+    kaminari (0.16.1)
       actionpack (>= 3.0.0)
       activesupport (>= 3.0.0)
     kgio (2.9.2)
@@ -83,34 +83,34 @@ GEM
       treetop (~> 1.4.8)
     mime-types (1.25.1)
     mini_portile (0.6.0)
-    minitest (5.3.5)
+    minitest (5.4.0)
     multi_json (1.10.1)
     mysql2 (0.3.16)
     nested_form (0.3.2)
-    nokogiri (1.6.2.1)
+    nokogiri (1.6.3.1)
       mini_portile (= 0.6.0)
     orm_adapter (0.5.0)
-    paperclip (4.1.1)
+    paperclip (4.2.0)
       activemodel (>= 3.0.0)
       activesupport (>= 3.0.0)
       cocaine (~> 0.5.3)
       mime-types
     polyglot (0.3.5)
     rack (1.5.2)
-    rack-pjax (0.7.0)
+    rack-pjax (0.8.0)
       nokogiri (~> 1.5)
-      rack (~> 1.3)
+      rack (~> 1.1)
     rack-test (0.6.2)
       rack (>= 1.0)
-    rails (4.1.4)
-      actionmailer (= 4.1.4)
-      actionpack (= 4.1.4)
-      actionview (= 4.1.4)
-      activemodel (= 4.1.4)
-      activerecord (= 4.1.4)
-      activesupport (= 4.1.4)
+    rails (4.1.5)
+      actionmailer (= 4.1.5)
+      actionpack (= 4.1.5)
+      actionview (= 4.1.5)
+      activemodel (= 4.1.5)
+      activerecord (= 4.1.5)
+      activesupport (= 4.1.5)
       bundler (>= 1.3.0, < 2.0)
-      railties (= 4.1.4)
+      railties (= 4.1.5)
       sprockets-rails (~> 2.0)
     rails_admin (0.6.2)
       builder (~> 3.1)
@@ -129,9 +129,9 @@ GEM
     rails_locale_detection (2.0.0.pre4)
       http_accept_language (~> 1.0.2)
       rails (>= 3.2.0)
-    railties (4.1.4)
-      actionpack (= 4.1.4)
-      activesupport (= 4.1.4)
+    railties (4.1.5)
+      actionpack (= 4.1.5)
+      activesupport (= 4.1.5)
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     raindrops (0.13.0)
@@ -142,15 +142,16 @@ GEM
       rspec-core (~> 3.0.0)
       rspec-expectations (~> 3.0.0)
       rspec-mocks (~> 3.0.0)
-    rspec-core (3.0.0)
+    rspec-core (3.0.4)
       rspec-support (~> 3.0.0)
-    rspec-expectations (3.0.0)
+    rspec-expectations (3.0.4)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.0.0)
-    rspec-instafail (0.2.4)
-    rspec-mocks (3.0.0)
+    rspec-instafail (0.2.5)
+      rspec
+    rspec-mocks (3.0.4)
       rspec-support (~> 3.0.0)
-    rspec-rails (3.0.1)
+    rspec-rails (3.0.2)
       actionpack (>= 3.0)
       activesupport (>= 3.0)
       railties (>= 3.0)
@@ -158,7 +159,7 @@ GEM
       rspec-expectations (~> 3.0.0)
       rspec-mocks (~> 3.0.0)
       rspec-support (~> 3.0.0)
-    rspec-support (3.0.0)
+    rspec-support (3.0.4)
     ruby-progressbar (1.5.1)
     safe_yaml (1.0.3)
     sass (3.2.19)
@@ -184,9 +185,9 @@ GEM
       polyglot (>= 0.3.1)
     turbolinks (2.2.2)
       coffee-rails
-    tzinfo (1.2.1)
+    tzinfo (1.2.2)
       thread_safe (~> 0.1)
-    uglifier (2.5.0)
+    uglifier (2.5.3)
       execjs (>= 0.3.0)
       json (>= 1.8.0)
     unicorn (4.8.3)
@@ -202,11 +203,11 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  bootstrap-sass (~> 3.1.1.1)
-  capybara (~> 2.3.0)
+  bootstrap-sass (~> 3.2.0)
+  capybara (~> 2.4.1)
   coffee-rails (~> 4.0.0)
-  devise (~> 3.2.4)
-  fuubar (~> 1.3.3)
+  devise (~> 3.3.0)
+  fuubar (~> 2.0.0)
   jquery-rails
   mysql2
   paperclip (~> 4.1)
diff --git a/db/schema.rb b/db/schema.rb
index 8b6ea3e..d65f93c 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -30,8 +30,8 @@
     t.string   "title",                      null: false
     t.boolean  "published",  default: false
     t.text     "content",                    null: false
-    t.datetime "created_at"
-    t.datetime "updated_at"
+    t.datetime "created_at",                 null: false
+    t.datetime "updated_at",                 null: false
   end
 
   create_table "rails_admin_histories", force: true do |t|
@@ -41,8 +41,8 @@
     t.string   "table"
     t.integer  "month",      limit: 2
     t.integer  "year",       limit: 8
-    t.datetime "created_at"
-    t.datetime "updated_at"
+    t.datetime "created_at",           null: false
+    t.datetime "updated_at",           null: false
   end
 
   add_index "rails_admin_histories", ["item", "table", "month", "year"], name: "index_rails_admin_histories", using: :btree
@@ -58,8 +58,8 @@
     t.datetime "last_sign_in_at"
     t.string   "current_sign_in_ip"
     t.string   "last_sign_in_ip"
-    t.datetime "created_at"
-    t.datetime "updated_at"
+    t.datetime "created_at",                          null: false
+    t.datetime "updated_at",                          null: false
   end
 
   add_index "users", ["email"], name: "index_users_on_email", unique: true, using: :btree