diff --git a/README.md b/README.md
index 36552da..16b9c4b 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,7 @@ Program setup,
 - Modify the options in `app/mmConfig.js`, including,
     - EXCHANGE_URL, point to tokenlon exchange server
     - PROVIDER_URL, point to ethereum node, like your infura endpoint
+    - PERMIT_TYPE, approve tokens to `RFQv2` contract directly or approve tokens to `AllowanceTarget` contract.
     - WALLET_ADDRESS, as your signer wallet address
     - WALLET_PRIVATE_KEY, private key of above wallet, or use WALLET_KEYSTORE
     - WALLET_TYPE, a market maker's wallet smart contract.
@@ -26,10 +27,10 @@ Program setup,
         - types.WalletType.ERC1271
         - types.WalletType.EOA
     - SIGNING_URL, If you wanna sign orders in your own service instead of the mmsk,
-   please set the SIGNING_URL to your service endpoint. the mmsk would post every unsigned RFQ orders to your service. Remember to set the WALLET_ADDRESS as well. An example request is shown below:
+   please set the SIGNING_URL to your service endpoint. the mmsk would post every unsigned PMM/RFQV1/RFQV2 orders to your service. Remember to set the WALLET_ADDRESS as well. An example RFQV1 request is shown below:
     ```
     {
-      rfqOrer: {
+      rfqOrder: {
         takerAddr: '0x87fca7135c1c54876a62dc4922da3ce45f38debf',
         makerAddr: '0x86B9F429C3Ef44c599EB560Eb531A0E3f2E36f64',
         takerAssetAddr: '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2',
@@ -55,7 +56,7 @@ Program setup,
     - HTTP_SERVER_ENDPOINT, your backend http quoting server
     - CHAIN_ID, 1 for mainnet, 5 for testnet(Goerli)
 - Testing with `node app/check.js`
-- Register contract address & signer address & MMSK server url to Tokenlon team
+- Register contract address, signer address and MMSK server url to Tokenlon team
 
 ## Version Release
 
diff --git a/package.json b/package.json
index b1deb95..2e96bdd 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@consenlabs/tokenlon-mmsk",
-  "version": "5.2.10",
+  "version": "5.3.0",
   "description": "Tokenlon market maker server kit",
   "author": "imToken PTE. LTD.",
   "license": "MIT",
diff --git a/src/handler/version.ts b/src/handler/version.ts
index 2699552..d299a81 100644
--- a/src/handler/version.ts
+++ b/src/handler/version.ts
@@ -1,4 +1,4 @@
-export const VERSION = '5.2.10'
+export const VERSION = '5.3.0'
 
 export const version = (ctx) => {
   ctx.body = {
diff --git a/src/signer/rfqv1.ts b/src/signer/rfqv1.ts
index de2d084..39d13da 100644
--- a/src/signer/rfqv1.ts
+++ b/src/signer/rfqv1.ts
@@ -149,11 +149,11 @@ export const buildSignedOrder = async (
   const signingUrl = options ? options.signingUrl : undefined
   order.salt = generateSaltWithFeeFactor(feeFactor, salt)
 
-  const rfqOrer = toRFQOrder(order)
+  const rfqOrder = toRFQOrder(order)
 
-  const orderHash = getOrderHash(rfqOrer)
+  const orderHash = getOrderHash(rfqOrder)
   console.log(`orderHash: ${orderHash}`)
-  const orderSignDigest = getOrderSignDigest(rfqOrer, chainId, rfqAddr)
+  const orderSignDigest = getOrderSignDigest(rfqOrder, chainId, rfqAddr)
   console.log(`orderSignDigest: ${orderSignDigest}`)
   let makerWalletSignature
   if (!signingUrl) {
@@ -161,9 +161,9 @@ export const buildSignedOrder = async (
       makerWalletSignature = await signRFQOrder(
         chainId,
         rfqAddr,
-        rfqOrer,
+        rfqOrder,
         signer,
-        rfqOrer.feeFactor,
+        rfqOrder.feeFactor,
         SignatureType.EIP712
       )
     } else if (walletType === WalletType.ERC1271_EIP712) {
@@ -171,9 +171,9 @@ export const buildSignedOrder = async (
       makerWalletSignature = await signRFQOrder(
         chainId,
         rfqAddr,
-        rfqOrer,
+        rfqOrder,
         signer,
-        rfqOrer.feeFactor,
+        rfqOrder.feeFactor,
         SignatureType.WalletBytes32
       )
     } else {
@@ -188,7 +188,7 @@ export const buildSignedOrder = async (
     }
   } else {
     makerWalletSignature = await forwardUnsignedOrder(signingUrl, {
-      rfqOrer: rfqOrer,
+      rfqOrder: rfqOrder,
       userAddr: userAddr,
       signer: signer.address,
       chainId: chainId,