diff --git a/assets/javascripts/templates/pages/about_tmpl.coffee b/assets/javascripts/templates/pages/about_tmpl.coffee
index d2dc1b24..0165ade2 100644
--- a/assets/javascripts/templates/pages/about_tmpl.coffee
+++ b/assets/javascripts/templates/pages/about_tmpl.coffee
@@ -711,6 +711,11 @@ credits = [
     '2010-2018 Christian Johansen',
     'BSD',
     'https://raw.githubusercontent.com/sinonjs/sinon/master/LICENSE'
+  ], [
+    'Sequelize',
+    '2014—present Sequelize contributors',
+    'MIT',
+    'https://raw.githubusercontent.com/sequelize/sequelize/master/LICENSE'
   ], [
     'Socket.io',
     '2014-2015 Automattic',
diff --git a/lib/docs/filters/sequelize/clean_html.rb b/lib/docs/filters/sequelize/clean_html.rb
new file mode 100644
index 00000000..27c4d552
--- /dev/null
+++ b/lib/docs/filters/sequelize/clean_html.rb
@@ -0,0 +1,59 @@
+module Docs
+  class Sequelize
+    class CleanHtmlFilter < Filter
+      def call
+        @doc = at_css('.content')
+
+        # Clean up the home page
+        if root_page? || subpath == "index.html"
+          # Remove logo
+          css('.manual-user-index > div > div.logo').remove
+
+          # Convert title to proper h1 element
+          at_css('.manual-user-index > div > div.sequelize').name = 'h1'
+
+          # Remove badges (NPM, Travis, test coverage, etc.)
+          css('.manual-user-index > p:nth-child(4)').remove
+
+          # Remove image cards pointing to entries of the manual
+          css('.manual-cards').remove
+
+          # Pull the header out of it's container
+          header = at_css('h1')
+          header.parent.parent.parent.add_previous_sibling header
+        else
+          # Pull the header out of it's container
+          header = at_css('h1')
+          header.parent.add_previous_sibling header
+        end
+
+        # Remove header notice
+        css('.header-notice').remove
+
+        # Change td in thead to th
+        css('table > thead > tr > td').each do |node|
+          node.name = 'th'
+        end
+
+        # Add syntax highlighting to code blocks
+        css('pre > code[class^="lang-"]').each do |node|
+          pre = node.parent
+          # Convert the existing language definitions to Prism-compatible attributes
+          pre['data-language'] = 'javascript' if node['class'] == 'lang-js' || node['class'] == 'lang-javascript'
+          pre['data-language'] = 'json'       if node['class'] == 'lang-json'
+          pre['data-language'] = 'shell'      if node['class'] == 'lang-sh' || node['class'] == 'lang-bash'
+          pre['data-language'] = 'sql'        if node['class'] == 'lang-sql'
+          pre['data-language'] = 'typescript' if node['class'] == 'lang-ts'
+        end
+
+        # Add syntax highlighting to source files
+        css('pre.raw-source-code').each do |node|
+          node['data-language'] = 'javascript'
+        end
+
+        # Return the cleaned-up document
+        doc
+      end
+    end
+  end
+end
diff --git a/lib/docs/filters/sequelize/entries.rb b/lib/docs/filters/sequelize/entries.rb
new file mode 100644
index 00000000..6cf7ed0e
--- /dev/null
+++ b/lib/docs/filters/sequelize/entries.rb
@@ -0,0 +1,33 @@
+module Docs
+  class Sequelize
+    class EntriesFilter < Docs::EntriesFilter
+      # Use the main title as the page name
+      def get_name
+        at_css('h1').text
+      end
+
+      # Assign the pages to main categories
+      def get_type
+        if path.start_with?('manual/')
+          'Manual'
+        elsif path.include?('lib/data-types')
+          'datatypes'
+        elsif path.include?('lib/errors/validation')
+          'errors/validation'
+        elsif path.include?('lib/errors/database')
+          'errors/database'
+        elsif path.include?('lib/errors/connection')
+          'errors/connection'
+        elsif path.include?('lib/errors')
+          'errors'
+        elsif path.include?('lib/associations')
+          'associations'
+        elsif path.include?('master/variable')
+          'variables'
+        else
+          'classes'
+        end
+      end
+    end
+  end
+end
diff --git a/lib/docs/scrapers/sequelize.rb b/lib/docs/scrapers/sequelize.rb
new file mode 100644
index 00000000..9e49ca50
--- /dev/null
+++ b/lib/docs/scrapers/sequelize.rb
@@ -0,0 +1,30 @@
+module Docs
+  class Sequelize < UrlScraper
+    self.name = 'Sequelize'
+    self.slug = 'sequelize'
+    self.type = 'simple'
+    self.release = '5.21.1'
+    self.base_url = 'https://sequelize.org/master/'
+    self.links = {
+      home: 'https://sequelize.org/',
+      code: 'https://github.com/sequelize/sequelize'
+    }
+
+    # List of content filters (to be applied sequentially)
+    html_filters.push 'sequelize/entries', 'sequelize/clean_html'
+
+    # Skip the source files, the license page and the "Who's using Sequelize" page
+    options[:skip_patterns] = [/\.js\.html/, /manual\/legal\.html/, /manual\/whos-using\.html/]
+
+    # License information that appears appears at the bottom of the entry page
+    options[:attribution] = <<-HTML
+      Copyright &copy; 2014&ndash;present Sequelize contributors<br>
+      Licensed under the MIT License.
+    HTML
+
+    # Method to fetch the most recent version of the project
+    def get_latest_version(opts)
+     get_npm_version('sequelize', opts)
+    end
+  end
+end
diff --git a/public/icons/docs/sequelize/16.png b/public/icons/docs/sequelize/16.png
new file mode 100644
index 00000000..c80f6561
Binary files /dev/null and b/public/icons/docs/sequelize/16.png differ
diff --git a/public/icons/docs/sequelize/16@2x.png b/public/icons/docs/sequelize/16@2x.png
new file mode 100644
index 00000000..78cb63a6
Binary files /dev/null and b/public/icons/docs/sequelize/16@2x.png differ
diff --git a/public/icons/docs/sequelize/SOURCE b/public/icons/docs/sequelize/SOURCE
new file mode 100644
index 00000000..03a2f866
--- /dev/null
+++ b/public/icons/docs/sequelize/SOURCE
@@ -0,0 +1 @@
+https://github.com/sequelize/sequelize/blob/master/docs/images/logo.png