diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..ba9713a
Binary files /dev/null and b/.DS_Store differ
diff --git a/sdk/.DS_Store b/sdk/.DS_Store
new file mode 100644
index 0000000..2075e8a
Binary files /dev/null and b/sdk/.DS_Store differ
diff --git a/sdk/abi/Minter.json b/sdk/abi/Minter.json
index 3dbdb8a..a24ed93 100644
--- a/sdk/abi/Minter.json
+++ b/sdk/abi/Minter.json
@@ -1,59 +1,4 @@
 [
-  {
-    "inputs": [],
-    "stateMutability": "nonpayable",
-    "type": "constructor"
-  },
-  {
-    "anonymous": false,
-    "inputs": [
-      {
-        "indexed": true,
-        "internalType": "address",
-        "name": "owner",
-        "type": "address"
-      },
-      {
-        "indexed": true,
-        "internalType": "address",
-        "name": "approved",
-        "type": "address"
-      },
-      {
-        "indexed": true,
-        "internalType": "uint256",
-        "name": "tokenId",
-        "type": "uint256"
-      }
-    ],
-    "name": "Approval",
-    "type": "event"
-  },
-  {
-    "anonymous": false,
-    "inputs": [
-      {
-        "indexed": true,
-        "internalType": "address",
-        "name": "owner",
-        "type": "address"
-      },
-      {
-        "indexed": true,
-        "internalType": "address",
-        "name": "operator",
-        "type": "address"
-      },
-      {
-        "indexed": false,
-        "internalType": "bool",
-        "name": "approved",
-        "type": "bool"
-      }
-    ],
-    "name": "ApprovalForAll",
-    "type": "event"
-  },
   {
     "anonymous": false,
     "inputs": [
@@ -73,25 +18,6 @@
     "name": "Mint",
     "type": "event"
   },
-  {
-    "anonymous": false,
-    "inputs": [
-      {
-        "indexed": true,
-        "internalType": "address",
-        "name": "previousOwner",
-        "type": "address"
-      },
-      {
-        "indexed": true,
-        "internalType": "address",
-        "name": "newOwner",
-        "type": "address"
-      }
-    ],
-    "name": "OwnershipTransferred",
-    "type": "event"
-  },
   {
     "anonymous": false,
     "inputs": [
@@ -117,132 +43,6 @@
     "name": "Transfer",
     "type": "event"
   },
-  {
-    "inputs": [],
-    "name": "_contractURI",
-    "outputs": [
-      {
-        "internalType": "string",
-        "name": "",
-        "type": "string"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "address",
-        "name": "to",
-        "type": "address"
-      },
-      {
-        "internalType": "uint256",
-        "name": "tokenId",
-        "type": "uint256"
-      }
-    ],
-    "name": "approve",
-    "outputs": [],
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "address",
-        "name": "owner",
-        "type": "address"
-      }
-    ],
-    "name": "balanceOf",
-    "outputs": [
-      {
-        "internalType": "uint256",
-        "name": "",
-        "type": "uint256"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "inputs": [],
-    "name": "baseURI",
-    "outputs": [
-      {
-        "internalType": "string",
-        "name": "",
-        "type": "string"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "inputs": [],
-    "name": "contractURI",
-    "outputs": [
-      {
-        "internalType": "string",
-        "name": "",
-        "type": "string"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "uint256",
-        "name": "tokenId",
-        "type": "uint256"
-      }
-    ],
-    "name": "getApproved",
-    "outputs": [
-      {
-        "internalType": "address",
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "inputs": [],
-    "name": "initialize",
-    "outputs": [],
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "address",
-        "name": "owner",
-        "type": "address"
-      },
-      {
-        "internalType": "address",
-        "name": "operator",
-        "type": "address"
-      }
-    ],
-    "name": "isApprovedForAll",
-    "outputs": [
-      {
-        "internalType": "bool",
-        "name": "",
-        "type": "bool"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function"
-  },
   {
     "inputs": [
       {
@@ -267,204 +67,6 @@
     "stateMutability": "nonpayable",
     "type": "function"
   },
-  {
-    "inputs": [],
-    "name": "name",
-    "outputs": [
-      {
-        "internalType": "string",
-        "name": "",
-        "type": "string"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "inputs": [],
-    "name": "owner",
-    "outputs": [
-      {
-        "internalType": "address",
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "uint256",
-        "name": "tokenId",
-        "type": "uint256"
-      }
-    ],
-    "name": "ownerOf",
-    "outputs": [
-      {
-        "internalType": "address",
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "inputs": [],
-    "name": "renounceOwnership",
-    "outputs": [],
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "address",
-        "name": "from",
-        "type": "address"
-      },
-      {
-        "internalType": "address",
-        "name": "to",
-        "type": "address"
-      },
-      {
-        "internalType": "uint256",
-        "name": "tokenId",
-        "type": "uint256"
-      }
-    ],
-    "name": "safeTransferFrom",
-    "outputs": [],
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "address",
-        "name": "from",
-        "type": "address"
-      },
-      {
-        "internalType": "address",
-        "name": "to",
-        "type": "address"
-      },
-      {
-        "internalType": "uint256",
-        "name": "tokenId",
-        "type": "uint256"
-      },
-      {
-        "internalType": "bytes",
-        "name": "_data",
-        "type": "bytes"
-      }
-    ],
-    "name": "safeTransferFrom",
-    "outputs": [],
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "address",
-        "name": "operator",
-        "type": "address"
-      },
-      {
-        "internalType": "bool",
-        "name": "approved",
-        "type": "bool"
-      }
-    ],
-    "name": "setApprovalForAll",
-    "outputs": [],
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "string",
-        "name": "_newBaseURI",
-        "type": "string"
-      }
-    ],
-    "name": "setBaseURI",
-    "outputs": [],
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "string",
-        "name": "_newContractURI",
-        "type": "string"
-      }
-    ],
-    "name": "setContractURI",
-    "outputs": [],
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "bytes4",
-        "name": "interfaceId",
-        "type": "bytes4"
-      }
-    ],
-    "name": "supportsInterface",
-    "outputs": [
-      {
-        "internalType": "bool",
-        "name": "",
-        "type": "bool"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "inputs": [],
-    "name": "symbol",
-    "outputs": [
-      {
-        "internalType": "string",
-        "name": "",
-        "type": "string"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "uint256",
-        "name": "tokenId",
-        "type": "uint256"
-      }
-    ],
-    "name": "tokenURI",
-    "outputs": [
-      {
-        "internalType": "string",
-        "name": "",
-        "type": "string"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function"
-  },
   {
     "inputs": [],
     "name": "totalSupply",
@@ -477,54 +79,5 @@
     ],
     "stateMutability": "view",
     "type": "function"
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "address",
-        "name": "from",
-        "type": "address"
-      },
-      {
-        "internalType": "address",
-        "name": "to",
-        "type": "address"
-      },
-      {
-        "internalType": "uint256",
-        "name": "tokenId",
-        "type": "uint256"
-      }
-    ],
-    "name": "transferFrom",
-    "outputs": [],
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "inputs": [
-      {
-        "internalType": "address",
-        "name": "newOwner",
-        "type": "address"
-      }
-    ],
-    "name": "transferOwnership",
-    "outputs": [],
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "inputs": [],
-    "name": "version",
-    "outputs": [
-      {
-        "internalType": "uint256",
-        "name": "",
-        "type": "uint256"
-      }
-    ],
-    "stateMutability": "pure",
-    "type": "function"
   }
 ]
diff --git a/sdk/helper/lockToken.js b/sdk/helper/lockToken.js
index caa4a62..b8c0e1f 100644
--- a/sdk/helper/lockToken.js
+++ b/sdk/helper/lockToken.js
@@ -19,6 +19,7 @@ const lockToken = async (web3, payer, wCid, amount, size) => {
   const optionsObj = {
     from: payer,
     gas: gasLimit,
+    gasPrice: await web3.eth.getGasPrice(),
   }
 
   const USDCInstance = new web3.eth.Contract(erc20ABI, usdcAddress)
diff --git a/sdk/helper/mint.js b/sdk/helper/mint.js
index cf3c21f..9934e21 100644
--- a/sdk/helper/mint.js
+++ b/sdk/helper/mint.js
@@ -23,6 +23,7 @@ const mint = async (web3, payer, sourceFileUploadId, nftObj) => {
   const optionsObj = {
     from: payer,
     gas: params.GAS_LIMIT,
+    gasPrice: await web3.eth.getGasPrice(),
   }
 
   const mintTx = await mintContract.methods
diff --git a/sdk/package-lock.json b/sdk/package-lock.json
index 2fc8e06..d7be712 100644
--- a/sdk/package-lock.json
+++ b/sdk/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "js-mcs-sdk",
-  "version": "2.0.2",
+  "version": "2.0.3",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "js-mcs-sdk",
-      "version": "2.0.2",
+      "version": "2.0.3",
       "license": "ISC",
       "dependencies": {
         "axios": "^0.26.1",
diff --git a/sdk/package.json b/sdk/package.json
index 779f1ee..ce67021 100644
--- a/sdk/package.json
+++ b/sdk/package.json
@@ -1,6 +1,6 @@
 {
   "name": "js-mcs-sdk",
-  "version": "2.0.2",
+  "version": "2.0.3",
   "description": "A SDK for the MCS service. It provides a convenient interface for working with the MCS API from a web browser or Node.js",
   "homepage": "https://github.com/filswan/js-mcs-sdk",
   "main": "index.js",