diff --git a/make_post_sell/lib/crypto_watcher.py b/make_post_sell/lib/crypto_watcher.py
index 150c1e4..326db52 100644
--- a/make_post_sell/lib/crypto_watcher.py
+++ b/make_post_sell/lib/crypto_watcher.py
@@ -348,7 +348,7 @@ class ShopContextRequestWrapper:
     @property
     def app(self):
         """Proxy app attribute from original request."""
-        return getattr(self._original_request, 'app', {})
+        return getattr(self._original_request, "app", {})
 
 
 def create_shop_context_request(env_request, crypto_payment: CryptoPayment):