diff --git a/lib/docs/filters/phalcon/clean_html.rb b/lib/docs/filters/phalcon/clean_html.rb
index 431d6f95..fb4ed6f5 100644
--- a/lib/docs/filters/phalcon/clean_html.rb
+++ b/lib/docs/filters/phalcon/clean_html.rb
@@ -18,6 +18,69 @@ module Docs
           css('.docSearch-content > ul').remove
         end
 
+        ### syntax highlight ###
+
+        css('.highlighter-rouge').each do |node|
+
+          next if node.classes.include?('language-yaml')
+          next if node.classes.include?('language-ini')
+          node.set_attribute('data-language', 'php')
+          node.remove_class('highlighter-rouge')
+          node.add_class('highlight-php')
+
+          node.css('.kt').each do |subnode|
+            subnode.remove_class('kt')
+            subnode.add_class('token constant')
+          end
+
+          node.css('.nb, .n').each do |subnode|
+            subnode.remove_class('nb')
+            subnode.remove_class('n')
+            subnode.add_class('token function')
+          end
+
+          node.css('.k, .kn, .kc, .cp').each do |subnode|
+            subnode.remove_class('k')
+            subnode.remove_class('kn')
+            subnode.remove_class('kc')
+            subnode.remove_class('cp')
+            subnode.add_class('token keyword')
+          end
+
+          node.css('.nv, .no').each do |subnode|
+            subnode.remove_class('nv')
+            subnode.remove_class('no')
+            subnode.add_class('token variable')
+          end
+
+          node.css('.s2').each do |subnode|
+            subnode.remove_class('s2')
+            subnode.add_class('token double-quoted-string string')
+          end
+
+          node.css('.p').each do |subnode|
+            subnode.remove_class('p')
+            subnode.add_class('token punctuation')
+          end
+
+          node.css('.nc, .nf').each do |subnode|
+            subnode.remove_class('nc')
+            subnode.remove_class('nf')
+            subnode.add_class('token class-name')
+          end
+
+          node.css('.o').each do |subnode|
+            subnode.remove_class('o')
+            subnode.add_class('token operator')
+          end
+
+          node.css('.cd').each do |subnode|
+            subnode.remove_class('cd')
+            subnode.add_class('token comment')
+          end
+
+        end
+
         doc
 
       end