diff --git a/src/tg/index.ts b/src/tg/index.ts
index c953a88..2103bc6 100644
--- a/src/tg/index.ts
+++ b/src/tg/index.ts
@@ -118,6 +118,12 @@ const externalTgApi = {
       console.log("TMA swipe behavior initialized");
     }
 
+    if (tg.closingBehavior.mount.ifAvailable()) {
+      tg.closingBehavior.mount();
+      tg.closingBehavior.enableConfirmation();
+      console.log("TMA closing behavior initialized");
+    }
+
     console.log(
       import.meta.env.DEV ? "TMA Debug mode in Web initialized" : "Telegram Mini App initialized",
     );