diff --git a/src/Git_Updater/Settings.php b/src/Git_Updater/Settings.php
index 6ac613624..7aea3da71 100644
--- a/src/Git_Updater/Settings.php
+++ b/src/Git_Updater/Settings.php
@@ -396,7 +396,7 @@ public function page_init() {
 		register_setting(
 			'git_updater',
 			'git_updater',
-			[ $this, 'sanitize' ]
+			[ 'sanitize_callback' => [ $this, 'sanitize' ] ]
 		);
 
 		Singleton::get_instance( 'Install', $this )->run();