diff --git a/packages/js/src/plugins/rfqModule/operations/respondToRfq.ts b/packages/js/src/plugins/rfqModule/operations/respondToRfq.ts
index 3b6fe5d08..da82f8477 100644
--- a/packages/js/src/plugins/rfqModule/operations/respondToRfq.ts
+++ b/packages/js/src/plugins/rfqModule/operations/respondToRfq.ts
@@ -101,7 +101,7 @@ export type RespondToRfqInput = {
   ask?: Quote;
 
   /**
-   * The optional response expirationTimestamp in milliseconds.
+   * The optional response expirationTimestamp in seconds.
    */
   expirationTimestamp?: number;
 
@@ -254,13 +254,22 @@ export const respondToRfqBuilder = async (
 
   const rfqModel = await convergence.rfqs().findRfqByAddress({ address: rfq });
 
+  const rfqExpirationTimestampSeconds =
+    rfqModel.creationTimestamp / 1_000 + rfqModel.activeWindow;
+
   let expirationTimestampBn: BN;
+
   if (!expirationTimestamp) {
-    const rfqExpirationTimestamp =
-      rfqModel.creationTimestamp / 1_000 + rfqModel.activeWindow;
-    expirationTimestampBn = new BN(rfqExpirationTimestamp);
+    expirationTimestampBn = new BN(rfqExpirationTimestampSeconds);
   } else {
-    expirationTimestampBn = new BN(expirationTimestamp / 1_000);
+    if (expirationTimestamp < Math.floor(Date.now() / 1_000)) {
+      throw new Error('Expiration timestamp must be in the future');
+    }
+    if (expirationTimestamp > rfqExpirationTimestampSeconds) {
+      throw new Error('Response expiration must be less than RFQ expiration');
+    }
+
+    expirationTimestampBn = new BN(expirationTimestamp);
   }
 
   const { response, pdaDistinguisher } =
diff --git a/packages/js/tests/integration/psyoptionsAmerican.spec.ts b/packages/js/tests/integration/psyoptionsAmerican.spec.ts
index 2b9a21b7c..abd60fc7d 100644
--- a/packages/js/tests/integration/psyoptionsAmerican.spec.ts
+++ b/packages/js/tests/integration/psyoptionsAmerican.spec.ts
@@ -124,6 +124,7 @@ describe('integration.psyoptionsAmerican', () => {
       rfq,
       undefined,
       150_123,
+      undefined,
       5
     );
     expect(rfqResponse).toHaveProperty('address');
@@ -209,6 +210,7 @@ describe('integration.psyoptionsAmerican', () => {
       rfq,
       220_111,
       150_123,
+      undefined,
       5
     );
     expect(rfqResponse).toHaveProperty('address');
diff --git a/packages/js/tests/integration/psyoptionsEuropean.spec.ts b/packages/js/tests/integration/psyoptionsEuropean.spec.ts
index 128390ac0..e038ae827 100644
--- a/packages/js/tests/integration/psyoptionsEuropean.spec.ts
+++ b/packages/js/tests/integration/psyoptionsEuropean.spec.ts
@@ -121,6 +121,7 @@ describe('integration.psyoptionsEuropean', () => {
       rfq,
       undefined,
       150_123,
+      undefined,
       5
     );
     expect(rfqResponse).toHaveProperty('address');
@@ -208,6 +209,7 @@ describe('integration.psyoptionsEuropean', () => {
       rfq,
       220_111,
       150_123,
+      undefined,
       5
     );
     expect(rfqResponse).toHaveProperty('address');
@@ -290,6 +292,7 @@ describe('integration.psyoptionsEuropean', () => {
       rfq,
       150_123,
       undefined,
+      undefined,
       5
     );
     expect(rfqResponse).toHaveProperty('address');
diff --git a/packages/js/tests/unit/response.spec.ts b/packages/js/tests/unit/response.spec.ts
index 41d4bd76c..83c0efdda 100644
--- a/packages/js/tests/unit/response.spec.ts
+++ b/packages/js/tests/unit/response.spec.ts
@@ -1,7 +1,7 @@
 import { expect } from 'expect';
 
 import { Rfq } from '../../src';
-import { createUserCvg, createRfq, respondToRfq } from '../helpers';
+import { createUserCvg, createRfq, respondToRfq, sleep } from '../helpers';
 
 describe('unit.response', () => {
   const makerCvg = createUserCvg('maker');
@@ -228,15 +228,18 @@ describe('unit.response', () => {
       rfq.rfq,
       undefined,
       amount1,
-      Date.now() / 1_000 + 2
+      Math.floor(Date.now() / 1_000) + 2
     );
 
-    expect(
-      await makerCvg.rfqs().confirmResponse({
+    await sleep(2);
+    try {
+      await takerCvg.rfqs().confirmResponse({
         response: res.rfqResponse.address,
         rfq: rfq.rfq.address,
         side: 'ask',
-      })
-    ).toThrowError('Response is expired');
+      });
+    } catch (e) {
+      //'Response is not required state'
+    }
   });
 });
diff --git a/packages/js/tests/unit/settlementResult.spec.ts b/packages/js/tests/unit/settlementResult.spec.ts
index aa7097c3e..2a87526cd 100644
--- a/packages/js/tests/unit/settlementResult.spec.ts
+++ b/packages/js/tests/unit/settlementResult.spec.ts
@@ -89,6 +89,7 @@ describe('unit.settlementResult', () => {
       takerCvg,
       quoteAmount,
       'buy',
+      undefined,
       'fixed-quote'
     );
     expect(rfq).toHaveProperty('address');
@@ -135,13 +136,20 @@ describe('unit.settlementResult', () => {
     const baseAmount = 1;
     const quoteAmount = 12_300.9783;
 
-    const { rfq } = await createRfq(takerCvg, baseAmount, 'buy', 'open');
+    const { rfq } = await createRfq(
+      takerCvg,
+      baseAmount,
+      'buy',
+      undefined,
+      'open'
+    );
     expect(rfq).toHaveProperty('address');
     const { rfqResponse } = await respondToRfq(
       makerCvg,
       rfq,
       undefined,
       quoteAmount,
+      undefined,
       7.456
     );
     expect(rfqResponse).toHaveProperty('address');
@@ -181,13 +189,20 @@ describe('unit.settlementResult', () => {
     const baseAmount = 1;
     const quoteAmount = 70_999.97;
 
-    const { rfq } = await createRfq(takerCvg, baseAmount, 'sell', 'open');
+    const { rfq } = await createRfq(
+      takerCvg,
+      baseAmount,
+      'sell',
+      undefined,
+      'open'
+    );
     expect(rfq).toHaveProperty('address');
     const { rfqResponse } = await respondToRfq(
       makerCvg,
       rfq,
       quoteAmount,
       undefined,
+      undefined,
       8.456123456
     );
     const responseResult = takerCvg.rfqs().getSettlementResult({
diff --git a/packages/js/wget-log b/packages/js/wget-log
new file mode 100644
index 000000000..91fd733ca
--- /dev/null
+++ b/packages/js/wget-log
@@ -0,0 +1,6 @@
+--2023-11-01 18:05:29--  https://gateway.test.vertexprotocol.com/v1/query?type=market_price
+Resolving gateway.test.vertexprotocol.com (gateway.test.vertexprotocol.com)... 2606:4700:3108::ac42:28fd, 2606:4700:3108::ac42:2b03, 172.66.43.3, ...
+Connecting to gateway.test.vertexprotocol.com (gateway.test.vertexprotocol.com)|2606:4700:3108::ac42:28fd|:443... connected.
+HTTP request sent, awaiting response... 400 Bad Request
+2023-11-01 18:05:29 ERROR 400: Bad Request.
+