add toBooleanStrict().required()

lib/form/me/user.js

@@ -7,5 +7,5 @@ module.exports = form(
   field('userForm.name').trim().required(),
   field('userForm.email').trim().isEmail().required(),
   field('userForm.lang').required(),
-  field('userForm.emailPublished').required()
+  field('userForm.emailPublished').trim().toBooleanStrict().required()
 );