diff --git a/src/class-pluginmodule.php b/src/class-pluginmodule.php
index b961c48788..f891c6e840 100644
--- a/src/class-pluginmodule.php
+++ b/src/class-pluginmodule.php
@@ -31,7 +31,7 @@ public function setup(): ServiceProviderInterface {
 	 *
 	 * @param ContainerInterface|null $container The Container.
 	 */
-	public function run( ContainerInterface $container = null ) {
+	public function run( ContainerInterface $container ) {
 	}
 
 	/**