diff --git a/src/JsonApiResource/ResourceObject.php b/src/JsonApiResource/ResourceObject.php
index e9d41e3..599318f 100644
--- a/src/JsonApiResource/ResourceObject.php
+++ b/src/JsonApiResource/ResourceObject.php
@@ -147,7 +147,8 @@ class ResourceObject implements CacheableDependencyInterface, ResourceIdentifier
   public function toUrl() {
     foreach ($this->links as $key => $link) {
       if ($key === 'self') {
-        return $link->getUri();
+        $first = reset($link);
+        return $first->getUri();
       }
     }
     throw new \LogicException('A Url does not exist for this resource object because its resource type is not locatable.');