diff --git a/app/webapi/schemas/miniapp.py b/app/webapi/schemas/miniapp.py
index 2ffc12ac..e580d1e9 100644
--- a/app/webapi/schemas/miniapp.py
+++ b/app/webapi/schemas/miniapp.py
@@ -590,8 +590,6 @@ class MiniAppTariffsResponse(BaseModel):
 
 class MiniAppTariffPurchaseRequest(BaseModel):
     """Запрос на покупку/смену тарифа."""
-    model_config = ConfigDict(populate_by_name=True)
-
     init_data: str = Field(..., alias="initData")
     tariff_id: int = Field(..., alias="tariffId")
     period_days: int = Field(..., alias="periodDays")
@@ -611,10 +609,8 @@ class MiniAppTariffPurchaseResponse(BaseModel):
 
 class MiniAppTariffSwitchRequest(BaseModel):
     """Запрос на переключение тарифа (без выбора периода)."""
-    model_config = ConfigDict(populate_by_name=True)
-
-    init_data: str = Field(..., alias="initData")
-    tariff_id: int = Field(..., alias="tariffId")
+    init_data: str = Field(...)
+    tariff_id: int = Field(...)
 
 
 class MiniAppTariffSwitchPreviewResponse(BaseModel):