diff --git a/js/generateClass.js b/js/generateClass.js
deleted file mode 100644
index e91c274..0000000
--- a/js/generateClass.js
+++ /dev/null
@@ -1,109 +0,0 @@
-const Web3PromiEvent = require('web3-core-promievent');
-
-function checkWeb3(web3) {
-  if (typeof web3.version !== 'string' || !web3.version.startsWith('1.')) {
-    throw new Error('web3 version 1.x is required');
-  }
-}
-
-const estimateGas = (web3, method, opts) => {
-  if (opts.$noEstimateGas) return Promise.resolve(4700000);
-  if (opts.$gas || opts.gas) return Promise.resolve(opts.$gas || opts.gas);
-
-  return method.estimateGas(opts)
-    // eslint-disable-next-line no-confusing-arrow
-    .then(gas => opts.$extraGas ? gas + opts.$extraGas : Math.floor(gas * 1.1));
-};
-
-// if constant method, executes a call, otherwise, estimates gas and executes send
-const execute = (web3, txObject, opts, cb) => {
-  const { _method } = txObject;
-
-  if (_method.constant) return txObject.call(opts);
-
-  // we need to create a new PromiEvent here b/c estimateGas returns a regular promise
-  // however on a 'send' we want to return a PromiEvent
-  const defer = new Web3PromiEvent();
-  const relayEvent = event => (...args) => defer.eventEmitter.emit(event, ...args);
-
-  estimateGas(web3, txObject, opts)
-    .then((gas) => {
-      Object.assign(opts, { gas });
-      return (cb) ? txObject.send(opts, cb) : txObject.send(opts)
-        // relay all events to our promiEvent
-        .on('transactionHash', relayEvent('transactionHash'))
-        .on('confirmation', relayEvent('confirmation'))
-        .on('receipt', relayEvent('receipt'))
-        .on('error', relayEvent('error'));
-    })
-    .then(defer.resolve)
-    .catch(defer.reject);
-
-  return defer.eventEmitter;
-};
-
-const methodWrapper = (web3, method, ...args) => {
-  let cb;
-  let opts = {};
-
-  if (typeof args[args.length - 1] === 'function') cb = args.pop();
-  if (typeof args[args.length - 1] === 'object') opts = args.pop();
-
-  const txObject = method(...args);
-
-  return execute(web3, txObject, opts, cb);
-};
-
-
-module.exports = (abi, bytecode) => {
-  const C = function C(web3, address) {
-    checkWeb3(web3);
-
-    this.$web3 = web3;
-    this.$address = address;
-    this.$contract = new web3.eth.Contract(abi, address);
-    this.$abi = abi;
-    this.$byteCode = bytecode;
-
-
-    Object.keys(this.$contract.methods)
-      .filter(key => !key.startsWith('0x'))
-      .forEach((key) => {
-        this[key] = (...args) => methodWrapper(web3, this.$contract.methods[key], ...args);
-      });
-
-    // set default from address
-    web3.eth.getAccounts()
-      .then((accounts) => {
-        this.$contract.options.from = (accounts.length > 0) ? accounts[0] : undefined;
-      });
-  };
-
-  C.new = function (web3, ...args) {
-    let opts = {};
-    if (args && args.length > 0 && typeof args[args.length - 1] === 'object') {
-      opts = args.pop();
-    }
-
-    const deploy = new web3.eth.Contract(abi)
-      .deploy({
-        data: bytecode,
-        arguments: args,
-      });
-
-    const getAccount = () => {
-      if (opts.from) return Promise.resolve(opts.from);
-
-      return web3.eth.getAccounts()
-        // eslint-disable-next-line no-confusing-arrow
-        .then(accounts => (accounts.length > 0) ? accounts[0] : undefined);
-    };
-
-    return getAccount()
-      .then(account => Object.assign(opts, { from: account }))
-      .then(() => execute(web3, deploy, opts))
-      .then(contract => new C(web3, contract.options.address));
-  };
-
-  return C;
-};
diff --git a/js/liquidPledging.js b/js/liquidPledging.js
index dc78ecb..693ef44 100644
--- a/js/liquidPledging.js
+++ b/js/liquidPledging.js
@@ -2,7 +2,7 @@ const LiquidPledgingAbi = require('../build/LiquidPledging.sol').LiquidPledgingA
 const LiquidPledgingCode = require('../build/LiquidPledging.sol').LiquidPledgingByteCode;
 const LiquidPledgingMockAbi = require('../build/LiquidPledgingMock.sol').LiquidPledgingMockAbi;
 const LiquidPledgingMockCode = require('../build/LiquidPledgingMock.sol').LiquidPledgingMockByteCode;
-const generateClass = require('./generateClass');
+const generateClass = require('eth-contract-class');
 
 module.exports = (test) => {
   const $abi = (test) ? LiquidPledgingMockAbi : LiquidPledgingAbi;
diff --git a/js/vault.js b/js/vault.js
index c464fed..836ff8c 100644
--- a/js/vault.js
+++ b/js/vault.js
@@ -1,5 +1,5 @@
 const VaultAbi = require('../build/Vault.sol').VaultAbi;
 const VaultByteCode = require('../build/Vault.sol').VaultByteCode;
-const generateClass = require('./generateClass');
+const generateClass = require('eth-contract-class');
 
 module.exports = generateClass(VaultAbi, VaultByteCode);
diff --git a/package.json b/package.json
index 3354e6a..e3ca660 100644
--- a/package.json
+++ b/package.json
@@ -42,8 +42,8 @@
   "homepage": "https://github.com/Giveth/liquidpledging#readme",
   "dependencies": {
     "async": "^2.4.0",
-    "ethconnector": "0.0.25",
     "chai": "^4.1.0",
-    "web3-core-promievent": "^1.0.0-beta.18"
+    "eth-contract-class": "0.0.1",
+    "ethconnector": "0.0.25"
   }
 }