diff --git a/autoload/emmet.vim b/autoload/emmet.vim
index 12e68c6..029f332 100644
--- a/autoload/emmet.vim
+++ b/autoload/emmet.vim
@@ -1359,6 +1359,12 @@ let s:emmet_settings = {
 \    },
 \    'html': {
 \        'snippets': {
+\            '!!!': "<!doctype html>",
+\            '!!!4t':  "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">",
+\            '!!!4s':  "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01//EN\" \"http://www.w3.org/TR/html4/strict.dtd\">",
+\            '!!!xt':  "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">",
+\            '!!!xs':  "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">",
+\            '!!!xxs': "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.1//EN\" \"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd\">",
 \            'c': "<!-- |${child} -->",
 \            'cc:ie6': "<!--[if lte IE 6]>\n\t${child}|\n<![endif]-->",
 \            'cc:ie': "<!--[if IE]>\n\t${child}|\n<![endif]-->",
