diff --git a/scripts/deploy.js b/scripts/deploy.js
index 19cf35d..ef12eb1 100644
--- a/scripts/deploy.js
+++ b/scripts/deploy.js
@@ -4,7 +4,7 @@ const fs = require('fs');
 const R = require('ramda');
 const chalk = require('chalk');
 const { network, arbitratorContract, arbitrableContract, arbitrationFee, arbitratorAddress } = require('../constants');
-const networks = require('../src/utils/networks.js');
+const networks = require('../src/utils/networks.json');
 
 const abiEncodeArgs = (deployed, contractArgs) => {
   if (!contractArgs || !deployed || !R.hasPath(['interface', 'deploy'], deployed)) return '';
diff --git a/src/contracts/Arbitrator.ts b/src/contracts/Arbitrator.ts
index bc3900d..1ead398 100644
--- a/src/contracts/Arbitrator.ts
+++ b/src/contracts/Arbitrator.ts
@@ -3,7 +3,7 @@ import { Contract } from '@ethersproject/contracts';
 import { BigNumber } from '@ethersproject/bignumber';
 import { formatEther } from '@ethersproject/units';
 import { Logger } from '@ethersproject/logger';
-import networks from '../utils/networks';
+import networks from '../utils/networks.json';
 import data from '../abis/AutoAppealableArbitrator.json';
 import { JsonRpcProvider } from '@ethersproject/providers';
 
diff --git a/src/contracts/SafientMain.ts b/src/contracts/SafientMain.ts
index af5edc4..d34c6d4 100644
--- a/src/contracts/SafientMain.ts
+++ b/src/contracts/SafientMain.ts
@@ -14,7 +14,8 @@ import { BigNumber } from '@ethersproject/bignumber';
 import { formatEther, parseEther } from '@ethersproject/units';
 import { Logger } from '@ethersproject/logger';
 import { Bytes } from 'ethers';
-import networks from '../utils/networks';
+import networks from '../utils/networks.json';
+import {getNetworkUrl} from "../utils/networks"
 import data from '../abis/SafientMain.json';
 
 /**
@@ -55,7 +56,8 @@ export class SafientMain {
 
     const network = Object.values(networks).find((network) => chainId === network.chainId);
 
-    this.provider = new JsonRpcProvider(network?.url)
+    const networkUrl = getNetworkUrl(chainId)
+    this.provider = new JsonRpcProvider(networkUrl)
 
     network !== undefined && network.addresses.SafientMain !== ''
       ? (this.safientMainAddress = network.addresses.SafientMain)
diff --git a/src/utils/networks.js b/src/utils/networks.js
index 3c8b707..7c7743b 100644
--- a/src/utils/networks.js
+++ b/src/utils/networks.js
@@ -3,54 +3,31 @@ dotenv.config()
 
 
 const networks = {
-  "localhost": {
-    "chainId": 31337,
-    "url": "http://localhost:8545",
-    "addresses": {
-      "AutoAppealableArbitrator": "0x5FbDB2315678afecb367f032d93F642f64180aa3",
-      "SafientMain": "0xe7f1725E7734CE288F8367e1Bb143E90bb3F0512"
-    }
+  localhost: {
+    chainId: 31337,
+    url: 'http://localhost:8545',
   },
-  "mainnet": {
-    "chainId": 1,
-    "url": `https://mainnet.infura.io/v3/${process.env.INFURA_API_KEY}`,
-    "addresses": {
-      "AutoAppealableArbitrator": "",
-      "SafientMain": ""
-    }
+  mainnet: {
+    chainId: 1,
+    url: `https://mainnet.infura.io/v3/${process.env.INFURA_API_KEY}`,
   },
-  "rinkeby": {
-    "chainId": 4,
-    "url": "",
-    "addresses": {
-      "AutoAppealableArbitrator": "0xf54D6b97749ECD28F9EbF836Ed9cE0C387a2f0A1",
-      "SafientMain": "0x2fF492C5D9d071a2bed17e30418aF128f22e42fA"
-    }
+  kovan: {
+    chainId: 42,  
+    url: `https://kovan.infura.io/v3/${process.env.INFURA_API_KEY}`,
+
   },
-  "kovan": {
-    "chainId": 42,
-    "url": `https://kovan.infura.io/v3/${process.env.INFURA_API_KEY}`,
-    "addresses": {
-      "AutoAppealableArbitrator": "0xf54D6b97749ECD28F9EbF836Ed9cE0C387a2f0A1",
-      "SafientMain": "0xF88915c8762aB973b64086221cDFd20Ec104F732"
-    }
+  polygontestnet: {
+      chainId: 80001,
+    url: 'https://matic-mumbai.chainstacklabs.com',
   },
-  "ropsten": {
-    "chainId": 3,
-    "url": "",
-    "addresses": {
-      "AutoAppealableArbitrator": "0xf54D6b97749ECD28F9EbF836Ed9cE0C387a2f0A1",
-      "SafientMain": "0xC0B0591Eac7887F443cef0f28BB818E454eD6637"
-    }
+  polygon : {
+      chainId: 137,
+    url: 'https://matic-mumbai.chainstacklabs.com',
+   
   },
-  "polygontestnet": {
-    "chainId": 80001,
-    "url": `https://matic-mumbai.chainstacklabs.com`,
-    "addresses": {
-      "AutoAppealableArbitrator": "0xf54D6b97749ECD28F9EbF836Ed9cE0C387a2f0A1",
-      "SafientMain": "0xccA53824ce8944a3cB7b21139bd177DEEe6e27C0"
-    }
-  }
 }
 
-module.exports = networks
\ No newline at end of file
+export const getNetworkUrl = (chainId) => {
+  const network = Object.values(networks).find(network => chainId === network.chainId);
+  return network.url
+}
\ No newline at end of file
diff --git a/src/utils/networks.json b/src/utils/networks.json
index 40d766b..8bcb64c 100644
--- a/src/utils/networks.json
+++ b/src/utils/networks.json
@@ -1,15 +1,13 @@
 {
   "localhost": {
     "chainId": 31337,
-    "url": "http://localhost:8545",
     "addresses": {
-      "AutoAppealableArbitrator": "0x5FbDB2315678afecb367f032d93F642f64180aa3",
-      "SafientMain": "0xe7f1725E7734CE288F8367e1Bb143E90bb3F0512"
+      "AutoAppealableArbitrator": "0xCf7Ed3AccA5a467e9e704C703E8D87F634fB0Fc9",
+      "SafientMain": "0xDc64a140Aa3E981100a9becA4E685f962f0cF6C9"
     }
   },
   "mainnet": {
     "chainId": 1,
-    "url": "https://mainnet.infura.io/v3/undefined",
     "addresses": {
       "AutoAppealableArbitrator": "",
       "SafientMain": ""
@@ -17,7 +15,6 @@
   },
   "rinkeby": {
     "chainId": 4,
-    "url": "",
     "addresses": {
       "AutoAppealableArbitrator": "0xf54D6b97749ECD28F9EbF836Ed9cE0C387a2f0A1",
       "SafientMain": "0x2fF492C5D9d071a2bed17e30418aF128f22e42fA"
@@ -25,7 +22,6 @@
   },
   "kovan": {
     "chainId": 42,
-    "url": "https://kovan.infura.io/v3/undefined",
     "addresses": {
       "AutoAppealableArbitrator": "0xf54D6b97749ECD28F9EbF836Ed9cE0C387a2f0A1",
       "SafientMain": "0xF88915c8762aB973b64086221cDFd20Ec104F732"
@@ -33,7 +29,6 @@
   },
   "ropsten": {
     "chainId": 3,
-    "url": "",
     "addresses": {
       "AutoAppealableArbitrator": "0xf54D6b97749ECD28F9EbF836Ed9cE0C387a2f0A1",
       "SafientMain": "0xC0B0591Eac7887F443cef0f28BB818E454eD6637"
@@ -41,7 +36,6 @@
   },
   "polygontestnet": {
     "chainId": 80001,
-    "url": "https://matic-mumbai.chainstacklabs.com",
     "addresses": {
       "AutoAppealableArbitrator": "0xf54D6b97749ECD28F9EbF836Ed9cE0C387a2f0A1",
       "SafientMain": "0xccA53824ce8944a3cB7b21139bd177DEEe6e27C0"