diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 120e05d..cffb3d7 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1,11 +1,16 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2017-02-23 16:58:35 +0100 using RuboCop version 0.39.0.
+# on 2017-08-01 10:49:49 -0400 using RuboCop version 0.47.1.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
 # versions of RuboCop, may require this file to be generated again.
 
+# Offense count: 6
+# Configuration parameters: CountComments, ExcludedMethods.
+BlockLength:
+  Max: 62
+
 # Offense count: 5
 # Configuration parameters: EnforcedStyle, SupportedStyles.
 # SupportedStyles: nested, compact
diff --git a/Gemfile b/Gemfile
deleted file mode 100644
index 31c90b5..0000000
--- a/Gemfile
+++ /dev/null
@@ -1,14 +0,0 @@
-## THIS GEMFILE IS DEPRECATED AND WILL BE REMOVED AFTER THE NEXT RELEASE
-## THERE WON'T BE ANY UPDATES TO THIS FILE DURING THIS RELEASE CYCLE
-## WE SWITCHED TO CHEFDK AS THE BUNDLE FOR THE NEEDED GEMS
-
-source 'https://rubygems.org'
-
-gem 'chef', '~> 11.18.6'
-gem 'json', '<= 1.7.7' # chef 11 dependency
-gem 'berkshelf', '~> 3.2.1'
-gem 'hashie', '~> 2.0'
-gem 'chefspec', '~> 4.0.0'
-gem 'rspec', '~> 3.0.0'
-gem 'foodcritic', '~> 4.0'
-gem 'rubocop', '~> 0.29.1'
diff --git a/attributes/default.rb b/attributes/default.rb
index e570601..4e3e2eb 100644
--- a/attributes/default.rb
+++ b/attributes/default.rb
@@ -21,6 +21,6 @@
 # Set to some text value if you want templated config files
 # to contain a custom banner at the top of the written file
 default['openstack']['db']['custom_template_banner'] = '
-# This file autogenerated by Chef
-# Do not edit, changes will be overwritten
+# This file is autogenerated by Chef.
+# Do not edit. Your changes will be overwritten!
 '
diff --git a/metadata.rb b/metadata.rb
index 467e2ed..c671b48 100755
--- a/metadata.rb
+++ b/metadata.rb
@@ -1,11 +1,9 @@
-name 'openstack-ops-database'
-maintainer 'openstack-chef'
+name             'openstack-ops-database'
+maintainer       'openstack-chef'
 maintainer_email 'openstack-dev@lists.openstack.org'
-issues_url 'https://launchpad.net/openstack-chef' if respond_to?(:issues_url)
-source_url 'https://github.com/openstack/cookbook-openstack-ops-database' if respond_to?(:source_url)
-license 'Apache 2.0'
-description 'Provides the shared database configuration for Chef for OpenStack.'
-version '15.0.0'
+license          'Apache 2.0'
+description      'Provides the shared database configuration for Chef for OpenStack.'
+version          '15.0.0'
 
 recipe 'client', 'Installs client packages for the database used by the deployment.'
 recipe 'server', 'Installs and configures server packages for the database used by the deployment.'
@@ -21,10 +19,15 @@ recipe 'openstack-db', 'Creates necessary tables, users, and grants for OpenStac
   supports os
 end
 
-depends 'mariadb', '~> 0.3.3'
-depends 'percona', '~> 0.16.1'
-depends 'mysql', '~> 8.2'
-depends 'mysql2_chef_gem', '~> 1.1'
-depends 'postgresql', '~> 5.1'
-depends 'database', '~> 6.1'
 depends 'openstack-common', '>= 15.0.0'
+
+depends 'database', '~> 6.1'
+depends 'mariadb', '~> 1.5'
+depends 'mysql', '~> 8.2'
+depends 'mysql2_chef_gem', '~> 2.0'
+depends 'percona', '~> 0.16.1'
+depends 'postgresql', '~> 5.1'
+
+issues_url 'https://launchpad.net/openstack-chef' if respond_to?(:issues_url)
+source_url 'https://github.com/openstack/cookbook-openstack-ops-database' if respond_to?(:source_url)
+chef_version '>= 12.5' if respond_to?(:chef_version)
diff --git a/recipes/mariadb-client.rb b/recipes/mariadb-client.rb
index 77ad1dd..db0b836 100644
--- a/recipes/mariadb-client.rb
+++ b/recipes/mariadb-client.rb
@@ -19,9 +19,8 @@
 node.override['mariadb']['install']['prefer_os_package'] = true
 include_recipe 'mariadb::client'
 
-mysql2_chef_gem 'default' do
-  provider Chef::Provider::Mysql2ChefGem::Mariadb
-  gem_version '0.4.4'
+mysql2_chef_gem_mariadb 'default' do
+  gem_version '0.4.5'
   action :install
 end
 
diff --git a/recipes/mysql-client.rb b/recipes/mysql-client.rb
index adf1d83..4afc307 100644
--- a/recipes/mysql-client.rb
+++ b/recipes/mysql-client.rb
@@ -34,7 +34,7 @@ when 'rhel'
 end
 
 mysql2_chef_gem 'default' do
-  gem_version '0.4.4'
+  gem_version '0.4.5'
   action :install
 end
 
diff --git a/spec/mariadb-client_spec.rb b/spec/mariadb-client_spec.rb
index 1380c8d..a5fa127 100644
--- a/spec/mariadb-client_spec.rb
+++ b/spec/mariadb-client_spec.rb
@@ -16,11 +16,6 @@ describe 'openstack-ops-database::mariadb-client' do
       expect(chef_run).to include_recipe('mariadb::client')
     end
 
-    it 'install mysql2 gem package' do
-      expect(chef_run).to install_mysql2_chef_gem('default')
-        .with(provider: Chef::Provider::Mysql2ChefGem::Mariadb)
-    end
-
     it 'installs mariadb python client packages' do
       expect(chef_run).to install_package('python-mysqldb')
     end
diff --git a/spec/postgresql-server_spec.rb b/spec/postgresql-server_spec.rb
index 3ed566f..785f3bd 100644
--- a/spec/postgresql-server_spec.rb
+++ b/spec/postgresql-server_spec.rb
@@ -19,7 +19,8 @@ describe 'openstack-ops-database::postgresql-server' do
 
     it 'includes postgresql recipes' do
       expect(chef_run).to include_recipe(
-        'openstack-ops-database::postgresql-client')
+        'openstack-ops-database::postgresql-client'
+      )
       expect(chef_run).to include_recipe('postgresql::server')
     end
   end
diff --git a/spec/server_spec.rb b/spec/server_spec.rb
index 9640a50..d06513d 100644
--- a/spec/server_spec.rb
+++ b/spec/server_spec.rb
@@ -21,7 +21,8 @@ describe 'openstack-ops-database::server' do
       node.set['postgresql']['password']['postgres'] = 'postgres_password'
 
       expect(chef_run).to include_recipe(
-        'openstack-ops-database::postgresql-server')
+        'openstack-ops-database::postgresql-server'
+      )
     end
   end
 end