diff --git a/src/signer/rfqv1.ts b/src/signer/rfqv1.ts
index 4aedc58..fc7624d 100644
--- a/src/signer/rfqv1.ts
+++ b/src/signer/rfqv1.ts
@@ -64,7 +64,7 @@ export async function signByMMPSigner(
     ])
     signature = '0x' + signatureBuffer.toString('hex')
     return signature
-  } else if (walletType === WalletType.ERC1271) {
+  } else if (walletType === WalletType.ERC1271_EIP712_EIP191) {
     // | 32 byte | 32 byte |1 byte| 1 bytes |
     // +---------|---------|------|---------+
     // |    R    |    S    |  V   | type(5) |
@@ -91,9 +91,62 @@ export const forwardUnsignedOrder = async (signingUrl: string, orderInfo: any):
   }
 }
 
+export const signRFQTx = async (
+  chainId: number,
+  rfqAddr: string,
+  signedOrder: any,
+  user: Wallet,
+  receiverAddr: string,
+  signatureType = SignatureType.EIP712
+) => {
+  const domain = {
+    name: 'Tokenlon',
+    version: 'v5',
+    chainId: chainId,
+    verifyingContract: rfqAddr,
+  }
+
+  const types = {
+    fillWithPermit: [
+      { name: 'makerAddr', type: 'address' },
+      { name: 'takerAssetAddr', type: 'address' },
+      { name: 'makerAssetAddr', type: 'address' },
+      { name: 'takerAssetAmount', type: 'uint256' },
+      { name: 'makerAssetAmount', type: 'uint256' },
+      { name: 'takerAddr', type: 'address' },
+      { name: 'receiverAddr', type: 'address' },
+      { name: 'salt', type: 'uint256' },
+      { name: 'deadline', type: 'uint256' },
+      { name: 'feeFactor', type: 'uint256' },
+    ],
+  }
+
+  // The data to sign
+  const value = {
+    makerAddr: signedOrder.makerAddr,
+    takerAssetAddr: signedOrder.takerAssetAddr,
+    makerAssetAddr: signedOrder.makerAssetAddr,
+    takerAssetAmount: signedOrder.takerAssetAmount.toString(),
+    makerAssetAmount: signedOrder.makerAssetAmount.toString(),
+    takerAddr: signedOrder.takerAddr,
+    receiverAddr: receiverAddr,
+    salt: signedOrder.salt.toString(),
+    deadline: signedOrder.deadline.toString(),
+    feeFactor: signedOrder.feeFactor.toString(),
+  }
+
+  const signatureTypedData = await user._signTypedData(domain, types, value)
+  const signature = Buffer.concat([
+    ethUtils.toBuffer(signatureTypedData),
+    ethUtils.toBuffer(signatureType),
+  ])
+  const eip712sig = '0x' + signature.toString('hex')
+  return eip712sig
+}
+
 export const buildSignedOrder = async (
   signer: Wallet,
-  order,
+  order: any,
   userAddr: string,
   chainId: number,
   rfqAddr: string,
@@ -111,16 +164,42 @@ export const buildSignedOrder = async (
   order.salt = generateSaltWithFeeFactor(feeFactor, salt)
 
   const rfqOrer = toRFQOrder(order)
+
   const orderHash = getOrderHash(rfqOrer)
   console.log(`orderHash: ${orderHash}`)
   const orderSignDigest = getOrderSignDigest(rfqOrer, chainId, rfqAddr)
   console.log(`orderSignDigest: ${orderSignDigest}`)
   let makerWalletSignature
   if (!signingUrl) {
-    makerWalletSignature =
-      signer.address.toLowerCase() == order.makerAddress.toLowerCase()
-        ? await signByEOA(orderSignDigest, signer)
-        : await signByMMPSigner(orderSignDigest, userAddr, feeFactor, signer, walletType)
+    if (signer.address.toLowerCase() == order.makerAddress.toLowerCase()) {
+      makerWalletSignature = await signRFQTx(
+        chainId,
+        rfqAddr,
+        rfqOrer,
+        signer,
+        rfqOrer.makerAddr,
+        SignatureType.EIP712
+      )
+    } else if (walletType === WalletType.ERC1271_EIP712) {
+      // standard ERC1271 + ERC712 signature
+      makerWalletSignature = await signRFQTx(
+        chainId,
+        rfqAddr,
+        rfqOrer,
+        signer,
+        rfqOrer.makerAddr,
+        SignatureType.WalletBytes32
+      )
+    } else {
+      // non-standard wallet contract signature checks
+      makerWalletSignature = await signByMMPSigner(
+        orderSignDigest,
+        userAddr,
+        feeFactor,
+        signer,
+        walletType
+      )
+    }
   } else {
     makerWalletSignature = await forwardUnsignedOrder(signingUrl, {
       rfqOrer: rfqOrer,
diff --git a/src/signer/types.ts b/src/signer/types.ts
index d24af07..f012bb1 100644
--- a/src/signer/types.ts
+++ b/src/signer/types.ts
@@ -47,6 +47,7 @@ export enum SignatureType {
 export enum WalletType {
   MMP_VERSION_4 = 1, // https://gist.github.com/NIC619/a3db1a743175bf592f2db983f17680dd#file-mmpv4-sol-L1236
   MMP_VERSION_5 = 2, // https://github.com/consenlabs/tokenlon-contracts/blob/e2edf7581b69bc8a40e61ff7fc1cd29674ae4887/contracts/MarketMakerProxy.sol#L19
-  ERC1271 = 3, // https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.6.0/contracts/utils/cryptography/SignatureChecker.sol#L36
+  ERC1271_EIP712_EIP191 = 3, // https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.6.0/contracts/utils/cryptography/SignatureChecker.sol#L36
   EOA = 4, // less security for market makers
+  ERC1271_EIP712 = 5,
 }
diff --git a/test/new_order.spec.ts b/test/new_order.spec.ts
index 866f47f..02aa574 100644
--- a/test/new_order.spec.ts
+++ b/test/new_order.spec.ts
@@ -565,7 +565,7 @@ describe('NewOrder', function () {
       mockMarkerMakerConfigUpdater.cacheResult = cacheResult
       updaterStack['markerMakerConfigUpdater'] = mockMarkerMakerConfigUpdater
       const signedOrderResp = await newOrder({
-        walletType: WalletType.ERC1271,
+        walletType: WalletType.ERC1271_EIP712_EIP191,
         signer: mmpSigner,
         chainID: 1,
         quoter: {
@@ -670,6 +670,7 @@ describe('NewOrder', function () {
       expect(signedOrderResp).is.not.null
       // verify data object
       const order = signedOrderResp.order
+      console.log(order)
       expect(order).is.not.null
       expect(order.protocol).eq(Protocol.RFQV1)
       expect(order.quoteId).eq('1--echo-testing-8888')
@@ -695,14 +696,49 @@ describe('NewOrder', function () {
       expect(order.takerFee).eq('0')
       // verify signature type
       const sigBytes = utils.arrayify(signedOrderResp.order.makerWalletSignature)
-      expect(sigBytes.length).eq(98)
-      expect(sigBytes[97]).eq(SignatureType.EthSign)
+      expect(sigBytes.length).eq(66)
+      expect(sigBytes[65]).eq(SignatureType.EIP712)
       // verify signature
       const rfqAddr = updaterStack['markerMakerConfigUpdater'].cacheResult.addressBookV5.RFQ
-      const orderSignDigest = getOrderSignDigest(toRFQOrder(signedOrderResp.order), 1, rfqAddr)
-      const recovered = utils.verifyMessage(
-        utils.arrayify(orderSignDigest),
-        utils.hexlify(sigBytes.slice(0, 65))
+      const signedOrder = toRFQOrder(signedOrderResp.order)
+      const domain = {
+        name: 'Tokenlon',
+        version: 'v5',
+        chainId: chainId,
+        verifyingContract: rfqAddr,
+      }
+      const types = {
+        fillWithPermit: [
+          { name: 'makerAddr', type: 'address' },
+          { name: 'takerAssetAddr', type: 'address' },
+          { name: 'makerAssetAddr', type: 'address' },
+          { name: 'takerAssetAmount', type: 'uint256' },
+          { name: 'makerAssetAmount', type: 'uint256' },
+          { name: 'takerAddr', type: 'address' },
+          { name: 'receiverAddr', type: 'address' },
+          { name: 'salt', type: 'uint256' },
+          { name: 'deadline', type: 'uint256' },
+          { name: 'feeFactor', type: 'uint256' },
+        ],
+      }
+      // The data to sign
+      const value = {
+        makerAddr: signedOrder.makerAddr,
+        takerAssetAddr: signedOrder.takerAssetAddr,
+        makerAssetAddr: signedOrder.makerAssetAddr,
+        takerAssetAmount: signedOrder.takerAssetAmount,
+        makerAssetAmount: signedOrder.makerAssetAmount,
+        takerAddr: signedOrder.takerAddr,
+        receiverAddr: signedOrder.makerAddr,
+        salt: signedOrder.salt,
+        deadline: signedOrder.deadline,
+        feeFactor: signedOrder.feeFactor,
+      }
+      const recovered = ethers.utils.verifyTypedData(
+        domain,
+        types,
+        value,
+        signedOrderResp.order.makerWalletSignature.slice(0, -2)
       )
       expect(recovered.toLowerCase()).eq(signer.address.toLowerCase())
       // verify random values