diff --git a/lib/entities/QuoteResponse.ts b/lib/entities/QuoteResponse.ts
index 4ca8394b..050bcf8f 100644
--- a/lib/entities/QuoteResponse.ts
+++ b/lib/entities/QuoteResponse.ts
@@ -54,14 +54,17 @@ export class QuoteResponse implements QuoteResponseData {
       stripUnknown: true,
     });
 
-    if (responseValidation.error) {
+    if (responseValidation?.error) {
       validationError = {
         message: responseValidation.error?.message,
         value: data,
       };
     }
 
-    if (request.tokenIn !== data.tokenIn || request.tokenOut !== data.tokenOut) {
+    if (
+      request?.tokenIn?.toLowerCase() !== data?.tokenIn?.toLowerCase() ||
+      request?.tokenOut?.toLowerCase() !== data?.tokenOut?.toLowerCase()
+    ) {
       validationError = {
         message: `RFQ response token mismatch: request tokenIn: ${request.tokenIn} tokenOut: ${request.tokenOut} response tokenIn: ${data.tokenIn} tokenOut: ${data.tokenOut}`,
         value: data,
diff --git a/test/entities/QuoteResponse.test.ts b/test/entities/QuoteResponse.test.ts
index 46b7c03e..5567f333 100644
--- a/test/entities/QuoteResponse.test.ts
+++ b/test/entities/QuoteResponse.test.ts
@@ -73,6 +73,23 @@ describe('QuoteRequest', () => {
       expect(response.validationError).toBe(undefined);
     });
 
+    it('fromRFQ with valid response - allow checksumed', async () => {
+      const response = QuoteResponse.fromRFQ(
+        quoteRequest,
+        {
+          chainId: CHAIN_ID,
+          requestId: REQUEST_ID,
+          tokenIn: TOKEN_IN.toLowerCase(),
+          amountIn: parseEther('1').toString(),
+          tokenOut: TOKEN_OUT.toLowerCase(),
+          amountOut: parseEther('1').toString(),
+          quoteId: QUOTE_ID,
+        },
+        TradeType.EXACT_INPUT
+      );
+      expect(response.validationError).toBe(undefined);
+    });
+
     it('fromRFQ with invalid response - wrong type amountIn', async () => {
       const invalidResponse = {
         chainId: CHAIN_ID,