diff --git a/src/Controllers/ElementalAreaController.php b/src/Controllers/ElementalAreaController.php
index 3475b15f..db7a7886 100644
--- a/src/Controllers/ElementalAreaController.php
+++ b/src/Controllers/ElementalAreaController.php
@@ -255,7 +255,7 @@ public function apiUnpublish(HTTPRequest $request): HTTPResponse
     /**
      * Returns configuration required by the client app
      */
-    public function getClientConfig()
+    public function getClientConfig(): array
     {
         $clientConfig = parent::getClientConfig();
         $clientConfig['form']['elementForm'] = [