1 files changed, 6 insertions, 0 deletions
diff --git a/lib/cgi/core.rb b/lib/cgi/core.rb
index e077c6d523..f1e8d3467a 100644
--- a/lib/cgi/core.rb
+++ b/lib/cgi/core.rb
@@ -771,6 +771,7 @@ class CGI
   #     "html4":: HTML 4.0
   #     "html4Tr":: HTML 4.0 Transitional
   #     "html4Fr":: HTML 4.0 with Framesets
+  #     "html5":: HTML 5
   #
   # <tt>block</tt>::
   #   If provided, the block is called when an invalid encoding is
@@ -831,6 +832,11 @@ class CGI
       extend Html4Fr
       element_init()
       extend HtmlExtension
+    when "html5"
+      require 'cgi/html'
+      extend Html5
+      element_init()
+      extend HtmlExtension
     end
   end