diff --git a/Gemfile b/Gemfile
index a696f40..a504149 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,7 +2,7 @@ source "https://rubygems.org"
 gem 'rails',                    '~> 3.2.21'
 gem 'minitest',                 '~> 3.2.0'
 gem 'fast_gettext',             '~> 0.6.8'
-gem 'acts-as-taggable-on',      '~> 3.0.2'
+gem 'acts-as-taggable-on',      '~> 3.4.2'
 gem 'rails_autolink',           '~> 1.1.5'
 gem 'pg',                       '~> 0.13.2'
 gem 'rmagick',                  '~> 2.13.1'
diff --git a/db/migrate/20150116181243_add_taggings_counter_cache_to_tags.acts_as_taggable_on_engine.rb b/db/migrate/20150116181243_add_taggings_counter_cache_to_tags.acts_as_taggable_on_engine.rb
new file mode 100644
index 0000000..8edb508
--- /dev/null
+++ b/db/migrate/20150116181243_add_taggings_counter_cache_to_tags.acts_as_taggable_on_engine.rb
@@ -0,0 +1,15 @@
+# This migration comes from acts_as_taggable_on_engine (originally 3)
+class AddTaggingsCounterCacheToTags < ActiveRecord::Migration
+  def self.up
+    add_column :tags, :taggings_count, :integer, default: 0
+
+    ActsAsTaggableOn::Tag.reset_column_information
+    ActsAsTaggableOn::Tag.find_each do |tag|
+      ActsAsTaggableOn::Tag.reset_counters(tag.id, :taggings)
+    end
+  end
+
+  def self.down
+    remove_column :tags, :taggings_count
+  end
+end
diff --git a/db/migrate/20150116181244_add_missing_taggable_index.acts_as_taggable_on_engine.rb b/db/migrate/20150116181244_add_missing_taggable_index.acts_as_taggable_on_engine.rb
new file mode 100644
index 0000000..71f2d7f
--- /dev/null
+++ b/db/migrate/20150116181244_add_missing_taggable_index.acts_as_taggable_on_engine.rb
@@ -0,0 +1,10 @@
+# This migration comes from acts_as_taggable_on_engine (originally 4)
+class AddMissingTaggableIndex < ActiveRecord::Migration
+  def self.up
+    add_index :taggings, [:taggable_id, :taggable_type, :context]
+  end
+
+  def self.down
+    remove_index :taggings, [:taggable_id, :taggable_type, :context]
+  end
+end
diff --git a/test/unit/article_test.rb b/test/unit/article_test.rb
index f7c5be5..96230ce 100644
--- a/test/unit/article_test.rb
+++ b/test/unit/article_test.rb
@@ -1,3 +1,4 @@
+# encoding: UTF-8
 require_relative "../test_helper"
 
 class ArticleTest < ActiveSupport::TestCase
@@ -770,6 +771,13 @@ class ArticleTest < ActiveSupport::TestCase
     assert_includes as, a
   end
 
+  should 'get tagged with tag that contains special chars' do
+    a = create(Article, :name => 'Published at', :profile_id => profile.id, :tag_list => 'Métodos Ágeis')
+    as = Article.tagged_with('Métodos Ágeis')
+
+    assert_includes as, a
+  end
+
   should 'not get tagged with tag from other environment' do
     article_from_this_environment = create(Article, :profile => profile, :tag_list => 'bli')
 
--
libgit2 0.21.2