diff --git a/database/factories/UserFactory.php b/database/factories/UserFactory.php
index 2449b0a1f..ea955ad06 100644
--- a/database/factories/UserFactory.php
+++ b/database/factories/UserFactory.php
@@ -52,7 +52,7 @@ public function unverified(): static
     /**
      * Indicate that the user should have a personal team.
      */
-    public function withPersonalTeam(callable $callback = null): static
+    public function withPersonalTeam(?callable $callback = null): static
     {
         if (! Features::hasTeamFeatures()) {
             return $this->state([]);
diff --git a/stubs/app/Actions/Jetstream/AddTeamMember.php b/stubs/app/Actions/Jetstream/AddTeamMember.php
index cf3ae4bdc..43f92a0d4 100644
--- a/stubs/app/Actions/Jetstream/AddTeamMember.php
+++ b/stubs/app/Actions/Jetstream/AddTeamMember.php
@@ -18,7 +18,7 @@ class AddTeamMember implements AddsTeamMembers
     /**
      * Add a new team member to the given team.
      */
-    public function add(User $user, Team $team, string $email, string $role = null): void
+    public function add(User $user, Team $team, string $email, ?string $role = null): void
     {
         Gate::forUser($user)->authorize('addTeamMember', $team);
 
diff --git a/stubs/app/Actions/Jetstream/InviteTeamMember.php b/stubs/app/Actions/Jetstream/InviteTeamMember.php
index 641360f56..08385acf0 100644
--- a/stubs/app/Actions/Jetstream/InviteTeamMember.php
+++ b/stubs/app/Actions/Jetstream/InviteTeamMember.php
@@ -21,7 +21,7 @@ class InviteTeamMember implements InvitesTeamMembers
     /**
      * Invite a new team member to the given team.
      */
-    public function invite(User $user, Team $team, string $email, string $role = null): void
+    public function invite(User $user, Team $team, string $email, ?string $role = null): void
     {
         Gate::forUser($user)->authorize('addTeamMember', $team);