diff --git a/package.json b/package.json
index ae04c1b..bed484c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mysterium-vpn-js",
-  "version": "3.0.0",
+  "version": "3.0.1",
   "description": "Javascript SDK for Mysterium node",
   "keywords": [
     "mysterium",
diff --git a/src/payment/method.ts b/src/payment/method.ts
index 74fcb76..b02a813 100644
--- a/src/payment/method.ts
+++ b/src/payment/method.ts
@@ -24,24 +24,26 @@ export interface PaymentMethod {
   }
 }
 
-export const pricePerMinute = (pm: PaymentMethod): Money => {
-  if (!pm.rate.perSeconds) {
-    return { amount: 0, currency: pm.price.currency }
+export const pricePerMinute = (pm?: PaymentMethod): Money => {
+  if (!pm || !pm.rate.perSeconds) {
+    // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+    return { amount: 0, currency: pm!.price.currency }
   }
   return {
-    amount: (60 / pm.rate.perSeconds) * pm.price.amount,
+    amount: Math.round((60 / pm.rate.perSeconds) * pm.price.amount),
     currency: pm.price.currency,
   }
 }
 
 const bytesInGiB = 1024 * 1024 * 1024
 
-export const pricePerGiB = (pm: PaymentMethod): Money => {
-  if (!pm.rate.perBytes) {
-    return { amount: 0, currency: pm.price.currency }
+export const pricePerGiB = (pm?: PaymentMethod): Money => {
+  if (!pm || !pm.rate.perBytes) {
+    // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+    return { amount: 0, currency: pm!.price.currency }
   }
   return {
-    amount: (bytesInGiB / pm.rate.perBytes) * pm.price.amount,
+    amount: Math.round((bytesInGiB / pm.rate.perBytes) * pm.price.amount),
     currency: pm.price.currency,
   }
 }