diff --git a/src/Resolver/NotificationResolver.php b/src/Resolver/NotificationResolver.php
index <HASH>..<HASH> 100644
--- a/src/Resolver/NotificationResolver.php
+++ b/src/Resolver/NotificationResolver.php
@@ -147,6 +147,11 @@ class NotificationResolver implements ResolverInterface
             ->setAllowedValues('url', function ($value) {
                 return $this->filterUrl($value);
             })
+            ->setDefined('web_url')
+            ->setAllowedTypes('web_url', 'string')
+            ->setAllowedValues('web_url', function ($value) {
+                return $this->filterUrl($value);
+            })
             ->setDefined('send_after')
             ->setAllowedTypes('send_after', '\DateTimeInterface')
             ->setNormalizer('send_after', function (Options $options, \DateTimeInterface $value) {
Merge pull request #<I> from simcen/master

Added missing web_url OneSignal option