diff --git a/package.json b/package.json
index 8c69db2..e3ecc0e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@nervina-labs/ckb-dex",
-  "version": "0.2.9",
+  "version": "0.2.10",
   "description": "The JavaScript SDK for CKB DEX",
   "author": "duanyytop <duanyytop@gmail.com>",
   "license": "MIT",
diff --git a/src/order/helper.ts b/src/order/helper.ts
index cbcf01a..b20d14a 100644
--- a/src/order/helper.ts
+++ b/src/order/helper.ts
@@ -8,9 +8,9 @@ import { serializeScript } from '@nervosnetwork/ckb-sdk-utils'
 
 // minimum occupied capacity and 1 ckb for transaction fee
 // assume UDT cell data size is 16bytes
-export const calculateUdtCellCapacity = (lock: CKBComponents.Script, udtType: CKBComponents.Script): bigint => {
+export const calculateUdtCellCapacity = (lock: CKBComponents.Script, udtType?: CKBComponents.Script): bigint => {
   const lockArgsSize = remove0x(lock.args).length / 2
-  const typeArgsSize = remove0x(udtType.args).length / 2
+  const typeArgsSize = udtType ? remove0x(udtType.args).length / 2 : 32
   const cellSize = 33 + lockArgsSize + 33 + typeArgsSize + 8 + 16
   return BigInt(cellSize + 1) * CKB_UNIT
 }
diff --git a/src/order/maker.ts b/src/order/maker.ts
index 926a843..dd2533c 100644
--- a/src/order/maker.ts
+++ b/src/order/maker.ts
@@ -30,7 +30,7 @@ export const calculateNFTMakerListPackage = (seller: string | CKBComponents.Scri
   return BigInt(orderArgsSize - sellerLockArgsSize) * CKB_UNIT
 }
 
-export const calculateUDTMakerListPackage = (seller: string | CKBComponents.Script, assetType: Hex | CKBComponents.Script): bigint => {
+export const calculateUDTMakerListPackage = (seller: string | CKBComponents.Script, assetType?: Hex | CKBComponents.Script): bigint => {
   const sellerLock = typeof seller === 'string' ? addressToScript(seller) : seller
 
   // The setup and totalValue are only used as a placeholder and does not affect the final size calculation.
@@ -42,9 +42,9 @@ export const calculateUDTMakerListPackage = (seller: string | CKBComponents.Scri
     ...getDexLockScript(false),
     args: orderArgs.toHex(),
   }
-  const assetTypeScript = typeof assetType === 'string' ? (blockchain.Script.unpack(assetType) as CKBComponents.Script) : assetType
+  const typeScript = typeof assetType === 'string' ? (blockchain.Script.unpack(assetType) as CKBComponents.Script) : assetType
 
-  return calculateUdtCellCapacity(orderLock, assetTypeScript)
+  return calculateUdtCellCapacity(orderLock, typeScript)
 }
 
 export const buildMakerTx = async ({