diff --git a/packages/panels/src/FilamentManager.php b/packages/panels/src/FilamentManager.php
index 1f9f9e02ee..d20e2a41a6 100644
--- a/packages/panels/src/FilamentManager.php
+++ b/packages/panels/src/FilamentManager.php
@@ -279,7 +279,7 @@ class FilamentManager
         return $this->getCurrentPanel()->getPages();
     }
 
-    public function getPanel(string $id = null): Panel
+    public function getPanel(?string $id = null): Panel
     {
         return app(PanelRegistry::class)->get($id);
     }
@@ -375,7 +375,7 @@ class FilamentManager
     /**
      * @param  array<mixed>  $parameters
      */
-    public function getTenantBillingUrl(array $parameters = [], Model $tenant = null): ?string
+    public function getTenantBillingUrl(array $parameters = [], ?Model $tenant = null): ?string
     {
         return $this->getCurrentPanel()->getTenantBillingUrl($tenant ?? $this->getTenant(), $parameters);
     }
@@ -509,7 +509,7 @@ class FilamentManager
         return $tenants;
     }
 
-    public function getUrl(Model $tenant = null): ?string
+    public function getUrl(?Model $tenant = null): ?string
     {
         return $this->getCurrentPanel()->getUrl($tenant);
     }
@@ -818,7 +818,7 @@ class FilamentManager
      *
      * @param  string | array<string>  $theme
      */
-    public function registerViteTheme(string | array $theme, string $buildDirectory = null): void
+    public function registerViteTheme(string | array $theme, ?string $buildDirectory = null): void
     {
         try {
             $this->getDefaultPanel()->viteTheme($theme, $buildDirectory);
@@ -865,7 +865,7 @@ class FilamentManager
         return $this->getCurrentPanel()->arePasswordsRevealable();
     }
 
-    public function getCurrentDomain(string $testingDomain = null): string
+    public function getCurrentDomain(?string $testingDomain = null): string
     {
         if (filled($this->currentDomain)) {
             return $this->currentDomain;