diff --git a/UPGRADE-4.0.md b/UPGRADE-4.0.md
index 68ecefb1b9..d543d6996a 100644
--- a/UPGRADE-4.0.md
+++ b/UPGRADE-4.0.md
@@ -70,4 +70,7 @@ The Twig filters that come with the bundle will no longer load a default templat
 The `sonata_admin` twig extension is now final. You may no longer extend it.
 
 ## SimplePager
-Method `SimplePager::getResults` is always returning an array
\ No newline at end of file
+Method `SimplePager::getResults` is always returning an array
+
+## LockInterface
+`LockInterface` extends from `ModelManagerInterface`.
diff --git a/src/Model/LockInterface.php b/src/Model/LockInterface.php
index 9641e61403..5ce55afb07 100644
--- a/src/Model/LockInterface.php
+++ b/src/Model/LockInterface.php
@@ -18,7 +18,7 @@
 /**
  * @author Emmanuel Vella <vella.emmanuel@gmail.com>
  */
-interface LockInterface
+interface LockInterface extends ModelManagerInterface
 {
     /**
      * @param object $object
diff --git a/tests/Admin/Extension/LockExtensionTest.php b/tests/Admin/Extension/LockExtensionTest.php
index f3a0bf4a76..f85dd29adb 100644
--- a/tests/Admin/Extension/LockExtensionTest.php
+++ b/tests/Admin/Extension/LockExtensionTest.php
@@ -215,7 +215,7 @@ private function configureFormMapper(): FormMapper
     private function configureAdmin(
         ?string $uniqid = null,
         ?Request $request = null,
-        $modelManager = null
+        ModelManagerInterface $modelManager = null
     ): void {
         $this->admin->getUniqid()->willReturn($uniqid);
         $this->admin->getRequest()->willReturn($request);