diff --git a/engine/core/signals.py b/engine/core/signals.py
index 1ba68dac..70ea6b72 100644
--- a/engine/core/signals.py
+++ b/engine/core/signals.py
@@ -107,7 +107,7 @@ def process_order_changes(instance: Order, created: bool, **kwargs: dict[Any, An
 
         if instance.status in ["CREATED", "PAYMENT"]:
             if not instance.is_whole_digital:
-                send_order_created_email.delay(instance.uuid)  # type: ignore [attr-defined]
+                send_order_created_email.delay(str(instance.uuid))
 
             for order_product in instance.order_products.filter(status="DELIVERING", product__is_digital=True):
                 if not order_product.product:
@@ -154,7 +154,7 @@ def process_order_changes(instance: Order, created: bool, **kwargs: dict[Any, An
         if instance.status == "FINISHED" and not instance.attributes.get("system_email_sent", False):
             instance.attributes["system_email_sent"] = True
             instance.save()
-            send_order_finished_email.delay(instance.uuid)  # type: ignore [attr-defined]
+            send_order_finished_email.delay(str(instance.uuid))
 
 
 # noinspection PyUnusedLocal
@@ -179,4 +179,4 @@ def update_category_name_lang(instance: Category, created: bool, **kwargs: dict[
 @receiver(post_save, sender=PromoCode)
 def send_promocode_creation_email(instance: PromoCode, created: bool, **kwargs: dict[Any, Any]) -> None:
     if created:
-        send_promocode_created_email.delay(instance.uuid)  # type: ignore [attr-defined]
+        send_promocode_created_email.delay(str(instance.uuid))
diff --git a/engine/payments/signals.py b/engine/payments/signals.py
index 4d0fc478..45644bc5 100644
--- a/engine/payments/signals.py
+++ b/engine/payments/signals.py
@@ -52,4 +52,4 @@ def process_transaction_changes(instance: Transaction, created: bool, **kwargs:
         success = instance.process.get("success", False)
 
         if ("success" in status or success) and (instance.process.get("notify", False)):
-            balance_deposit_email.delay(instance.uuid)  # type: ignore [attr-defined]
+            balance_deposit_email.delay(str(instance.uuid))
diff --git a/engine/vibes_auth/serializers.py b/engine/vibes_auth/serializers.py
index e849d65d..b2f9a0c7 100644
--- a/engine/vibes_auth/serializers.py
+++ b/engine/vibes_auth/serializers.py
@@ -207,7 +207,7 @@ class TokenRefreshSerializer(Serializer):
 
         self.retrieve_user: bool = retrieve_user
 
-    def validate(self, attrs: dict[str, Any]) -> dict[str, str]:
+    def validate(self, attrs: dict[str, Any]) -> dict[str, Any]:
         refresh = self.token_class(attrs["refresh"])
 
         data: dict[str, str | dict[str, Any]] = {"access": str(refresh.access_token)}
diff --git a/engine/vibes_auth/viewsets.py b/engine/vibes_auth/viewsets.py
index f252ddb9..c0322a06 100644
--- a/engine/vibes_auth/viewsets.py
+++ b/engine/vibes_auth/viewsets.py
@@ -60,7 +60,7 @@ class UserViewSet(
         with suppress(User.DoesNotExist):
             user = User.objects.get(email=request.data.get("email"))
         if user:
-            send_reset_password_email_task.delay(user_pk=user.uuid)  # type: ignore [attr-defined]
+            send_reset_password_email_task.delay(user_pk=str(user.uuid))
         return Response(status=status.HTTP_200_OK)
 
     @action(detail=True, methods=["put"], permission_classes=[IsAuthenticated])