diff --git a/source/Ox/js/String.js b/source/Ox/js/String.js
index d958750c..d66ed38a 100644
--- a/source/Ox/js/String.js
+++ b/source/Ox/js/String.js
@@ -100,7 +100,7 @@ Ox.isValidEmail <f> Tests if a string is a valid e-mail address
     false
 @*/
 Ox.isValidEmail = function(string) {
-    return !!/^[0-9A-Z\.\+\-_]+@(?:[0-9A-Z\-]+\.)+[A-Z]{2,6}$/i.test(string);
+    return !!/^[0-9A-Z\.\+\-_]+@(?:[0-9A-Z\-]+\.)+[A-Z]{2,64}$/i.test(string);
 };
 
 /*@