diff --git a/src/iden3comm/handlers/payment.ts b/src/iden3comm/handlers/payment.ts
index dc2f8d10..cda276dd 100644
--- a/src/iden3comm/handlers/payment.ts
+++ b/src/iden3comm/handlers/payment.ts
@@ -94,7 +94,7 @@ export async function verifyEIP712TypedData(
       ? {
           recipient: data.recipient,
           amount: convertedAmount,
-          expirationDate: data.expirationDate,
+          expirationDate: getUnixTimestamp(new Date(data.expirationDate)),
           nonce: data.nonce,
           metadata: '0x'
         }
@@ -102,7 +102,7 @@ export async function verifyEIP712TypedData(
           tokenAddress: data.tokenAddress,
           recipient: data.recipient,
           amount: convertedAmount,
-          expirationDate: data.expirationDate,
+          expirationDate: getUnixTimestamp(new Date(data.expirationDate)),
           nonce: data.nonce,
           metadata: '0x'
         };
@@ -603,7 +603,7 @@ export class PaymentHandler
           recipient,
           amount: amount.toString(),
           currency,
-          expirationDate: getUnixTimestamp(expirationDateRequired).toString(),
+          expirationDate: expirationDateRequired.toISOString(),
           nonce: nonce.toString(),
           metadata: '0x',
           proof
diff --git a/tests/handlers/payment.test.ts b/tests/handlers/payment.test.ts
index 656b8dde..6dda37c1 100644
--- a/tests/handlers/payment.test.ts
+++ b/tests/handlers/payment.test.ts
@@ -467,7 +467,7 @@ describe('payment-request handler', () => {
         recipient: '0xE9D7fCDf32dF4772A7EF7C24c76aB40E4A42274a',
         amount: '0.00003',
         currency: SupportedCurrencies.ETH_GWEI,
-        expirationDate: '2362135500',
+        expirationDate: '2044-11-07T12:45:00.000Z',
         nonce: '411390',
         metadata: '0x',
         proof: [
@@ -513,7 +513,7 @@ describe('payment-request handler', () => {
         recipient: '0xE9D7fCDf32dF4772A7EF7C24c76aB40E4A42274a',
         amount: '0.00003',
         currency: 'USDT',
-        expirationDate: '2362135500',
+        expirationDate: '2044-11-07T12:45:00.000Z',
         nonce: '411390',
         metadata: '0x',
         proof: [