diff --git a/autoload/emmet/lang/html.vim b/autoload/emmet/lang/html.vim
index 5e374f7f..a52cd492 100644
--- a/autoload/emmet/lang/html.vim
+++ b/autoload/emmet/lang/html.vim
@@ -6,7 +6,7 @@ let s:mx = '\([+>]\|[<^]\+\)\{-}'
 \         .'\%('
 \           .'\%(#{[{}a-zA-Z0-9_\-\$]\+\|#[a-zA-Z0-9_\-\$]\+\)'
 \           .'\|\%(\[\%(\[[^\]]*\]\|"[^"]*"\|[^"\[\]]*\)\+\]\)'
-\           .'\|\%(\.{[{}a-zA-Z0-9_\-\$\.]\+\|\.[a-zA-Z0-9_\-\$]\+\)'
+\           .'\|\%(\.{[{}a-zA-Z0-9_\-\$/:\.]\+\|\.[a-zA-Z0-9_\-\$/:]\+\)'
 \         .'\)*'
 \       .'\)'
 \       .'\%(\(' . s:bx . '\+\)\)\{0,1}'
@@ -265,7 +265,7 @@ function! emmet#lang#html#parseIntoTree(abbr, type) abort
     if len(attributes)
       let attr = attributes
       while len(attr)
-        let item = matchstr(attr, '\(\%(\%(#[{}a-zA-Z0-9_\-\$]\+\)\|\%(\[\%(\[[^\]]*\]\|"[^"]*"\|[^"\[\]]*\)\+\]\)\|\%(\.[{}a-zA-Z0-9_\-\$]\+\)*\)\)')
+        let item = matchstr(attr, '\(\%(\%(#[{}a-zA-Z0-9_\-\$]\+\)\|\%(\[\%(\[[^\]]*\]\|"[^"]*"\|[^"\[\]]*\)\+\]\)\|\%(\.[{}a-zA-Z0-9_\-\$/:]\+\)*\)\)')
         if g:emmet_debug > 1
           echomsg 'attr=' . item
         endif