diff --git a/src/Knp/Menu/Twig/MenuExtension.php b/src/Knp/Menu/Twig/MenuExtension.php
index f484aa4b..12a2b663 100644
--- a/src/Knp/Menu/Twig/MenuExtension.php
+++ b/src/Knp/Menu/Twig/MenuExtension.php
@@ -57,6 +57,14 @@ public function getTests(): array
         ];
     }
 
+    public function getLastModified(): int
+    {
+        return max(
+            (int) filemtime(__FILE__),
+            (int) filemtime(__DIR__.'/MenuRuntimeExtension.php'),
+        );
+    }
+
     /**
      * @param array<int, string>   $path
      * @param array<string, mixed> $options
diff --git a/tests/Knp/Menu/Tests/Twig/MenuExtensionTest.php b/tests/Knp/Menu/Tests/Twig/MenuExtensionTest.php
index 23afe847..18c2ae5c 100644
--- a/tests/Knp/Menu/Tests/Twig/MenuExtensionTest.php
+++ b/tests/Knp/Menu/Tests/Twig/MenuExtensionTest.php
@@ -163,6 +163,14 @@ public function testGetCurrentItem(): void
         $this->assertEquals('current', $this->getTemplate('{{ knp_menu_get_current_item("default") is knp_menu_current ? "current" : "not current" }}', $helper, $matcher)->render([]));
     }
 
+    public function testLastModified(): void
+    {
+        $this->assertSame(max(
+            filemtime((new \ReflectionClass(MenuExtension::class))->getFileName()),
+            filemtime((new \ReflectionClass(MenuRuntimeExtension::class))->getFileName()),
+        ), (new MenuExtension())->getLastModified());
+    }
+
     /**
      * @param array<string> $methods
      */