diff --git a/server.js b/server.js
index f6073be..8e5a05a 100755
--- a/server.js
+++ b/server.js
@@ -56,7 +56,7 @@ server.listen(port, function() {
 
 
 function minifyRoomHash(hash) {
-	let text = hash.replace(new RegExp('[^A-Z^a-z^0-9]', 'g'), '');
+	let text = hash.replace(new RegExp('[\\W_]', 'g'), '');
 	text += 'roomID';
 	return text.slice(0, 6);
 }