diff --git a/extensions/tags/src/TagRepository.php b/extensions/tags/src/TagRepository.php
index 50f8a9bcb..8ea1b683b 100644
--- a/extensions/tags/src/TagRepository.php
+++ b/extensions/tags/src/TagRepository.php
@@ -26,7 +26,7 @@ class TagRepository
         return Tag::query();
     }
 
-    public function queryVisibleTo(User $actor): Builder
+    public function queryVisibleTo(?User $actor = null): Builder
     {
         return $this->scopeVisibleTo($this->query(), $actor);
     }
@@ -114,7 +114,7 @@ class TagRepository
      * @param User|null $user
      * @return Builder<Tag>
      */
-    protected function scopeVisibleTo(Builder $query, User $user = null)
+    protected function scopeVisibleTo(Builder $query, ?User $user = null)
     {
         if ($user !== null) {
             $query->whereVisibleTo($user);
diff --git a/framework/core/src/Group/GroupRepository.php b/framework/core/src/Group/GroupRepository.php
index 48975533e..30bd06218 100644
--- a/framework/core/src/Group/GroupRepository.php
+++ b/framework/core/src/Group/GroupRepository.php
@@ -41,7 +41,7 @@ class GroupRepository
         return $this->scopeVisibleTo($query, $actor)->firstOrFail();
     }
 
-    public function queryVisibleTo(User $actor = null)
+    public function queryVisibleTo(?User $actor = null)
     {
         return $this->scopeVisibleTo($this->query(), $actor);
     }
@@ -53,7 +53,7 @@ class GroupRepository
      * @param User|null $actor
      * @return Builder<Group>
      */
-    protected function scopeVisibleTo(Builder $query, User $actor = null)
+    protected function scopeVisibleTo(Builder $query, ?User $actor = null)
     {
         if ($actor !== null) {
             $query->whereVisibleTo($actor);
diff --git a/framework/core/src/Post/PostRepository.php b/framework/core/src/Post/PostRepository.php
index 11ad9f308..b764ae8eb 100644
--- a/framework/core/src/Post/PostRepository.php
+++ b/framework/core/src/Post/PostRepository.php
@@ -29,7 +29,7 @@ class PostRepository
      * @param User|null $user
      * @return Builder<Post>
      */
-    public function queryVisibleTo(User $user = null)
+    public function queryVisibleTo(?User $user = null)
     {
         $query = $this->query();