diff --git a/src/ServiceWiring.php b/src/ServiceWiring.php
index 605741c..f32a341 100644
--- a/src/ServiceWiring.php
+++ b/src/ServiceWiring.php
@@ -14,7 +14,7 @@
 
 /** @phpcs-require-sorted-array */
 return [
-	'FlarumApiService' => function ( MediaWikiServices $services ) : FlarumApiService {
+	'FlarumApiService' => static function ( MediaWikiServices $services ): FlarumApiService {
 		return new FlarumApiService();
 	}
 ];