diff --git a/src/services/purchaseService.ts b/src/services/purchaseService.ts
index 69723d24..726fad1d 100644
--- a/src/services/purchaseService.ts
+++ b/src/services/purchaseService.ts
@@ -335,8 +335,19 @@ const handleCreditBundlePurchase = async (
     inventory: TInventoryDatabaseDocument
 ): Promise<IPurchaseResponse> => {
     const bundleName = typeName.split(typeName).pop();
+    let creditsAmount = 0;
+
     // CreditBundleA = 50.000 credits or CreditBundleC = 175.000 credits
-    const creditsAmount = bundleName == "CreditBundleA" ? 50_000 : 175_000;
+    switch (bundleName) {
+        case "CreditBundleA":
+            creditsAmount = 50_000;
+            break;
+        case "CreditBundleC":
+            creditsAmount = 175_000;
+            break;
+        default:
+            throw new Error("invalid credit bundle: " + bundleName);
+    }
 
     inventory.RegularCredits += creditsAmount;
     await inventory.save();