diff --git a/src/selector.js b/src/selector.js
index 36d5dde5..6dcab37f 100644
--- a/src/selector.js
+++ b/src/selector.js
@@ -68,7 +68,7 @@ jQuery.extend({
 	// The regular expressions that power the parsing engine
 	parse: [
 		// Match: [@value='test'], [@foo]
-		/^(\[) *@?([\w-]+) *([!*$^~=]*) *('?"?)(.*?)\4 *\]/,
+		/^(\[) *@?([\w:-]+) *([!*$^~=]*) *('?"?)(.*?)\4 *\]/,
 
 		// Match: :contains('foo')
 		/^(:)([\w-]+)\("?'?(.*?(\(.*?\))?[^(]*?)"?'?\)/,