diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000..a3842bc
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,33 @@
+name: build
+
+on:
+  push:
+    branches: ['*']
+    tags: ['v[0-9]+.[0-9]+.[0-9]+']
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: 12
+      - run: yarn install
+      - run: yarn download
+      - run: cp .env.example .env
+      - run: npx ganache-cli > /dev/null &
+      - run: npm run migrate:dev
+      - run: yarn test
+      - run: node cli.js test
+      - run: yarn lint
+      - name: Telegram Failure Notification
+        uses: appleboy/telegram-action@0.0.7
+        if: failure()
+        with:
+          message: ❗ Build failed for [${{ github.repository }}](https://github.com/${{ github.repository }}/actions) because of ${{ github.actor }}
+          format: markdown
+          to: ${{ secrets.TELEGRAM_CHAT_ID }}
+          token: ${{ secrets.TELEGRAM_BOT_TOKEN }}
diff --git a/contracts/ERC20Tornado.sol b/contracts/ERC20Tornado.sol
index 0166e81..763f038 100644
--- a/contracts/ERC20Tornado.sol
+++ b/contracts/ERC20Tornado.sol
@@ -19,7 +19,7 @@ contract ERC20Tornado is Tornado {
 
   constructor(
     IVerifier _verifier,
-    Hasher _hasher,
+    IHasher _hasher,
     uint256 _denomination,
     uint32 _merkleTreeHeight,
     address _token
diff --git a/contracts/ETHTornado.sol b/contracts/ETHTornado.sol
index 215b359..5e6bb26 100644
--- a/contracts/ETHTornado.sol
+++ b/contracts/ETHTornado.sol
@@ -17,7 +17,7 @@ import "./Tornado.sol";
 contract ETHTornado is Tornado {
   constructor(
     IVerifier _verifier,
-    Hasher _hasher,
+    IHasher _hasher,
     uint256 _denomination,
     uint32 _merkleTreeHeight
   ) public Tornado(_verifier, _hasher, _denomination, _merkleTreeHeight) {}
diff --git a/contracts/MerkleTreeWithHistory.sol b/contracts/MerkleTreeWithHistory.sol
index d6aa670..52a8b90 100644
--- a/contracts/MerkleTreeWithHistory.sol
+++ b/contracts/MerkleTreeWithHistory.sol
@@ -12,7 +12,7 @@
 // SPDX-License-Identifier: MIT
 pragma solidity ^0.6.0;
 
-interface Hasher {
+interface IHasher {
   function MiMCSponge(uint256 in_xL, uint256 in_xR) external pure returns (uint256 xL, uint256 xR);
 }
 
@@ -30,9 +30,9 @@ contract MerkleTreeWithHistory {
   uint32 public nextIndex = 0;
   uint32 public constant ROOT_HISTORY_SIZE = 100;
   bytes32[ROOT_HISTORY_SIZE] public roots;
-  Hasher public immutable hasher;
+  IHasher public immutable hasher;
 
-  constructor(uint32 _treeLevels, Hasher _hasher) public {
+  constructor(uint32 _treeLevels, IHasher _hasher) public {
     require(_treeLevels > 0, "_treeLevels should be greater than zero");
     require(_treeLevels < 32, "_treeLevels should be less than 32");
     levels = _treeLevels;
@@ -56,7 +56,7 @@ contract MerkleTreeWithHistory {
     @dev Hash 2 tree leaves, returns MiMC(_left, _right)
   */
   function hashLeftRight(
-    Hasher _hasher,
+    IHasher _hasher,
     bytes32 _left,
     bytes32 _right
   ) public pure returns (bytes32) {
diff --git a/contracts/Mocks/ERC20Mock.sol b/contracts/Mocks/ERC20Mock.sol
index 091bcc4..d291a6e 100644
--- a/contracts/Mocks/ERC20Mock.sol
+++ b/contracts/Mocks/ERC20Mock.sol
@@ -3,4 +3,8 @@ pragma solidity ^0.6.0;
 
 import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
 
-contract ERC20Mock is ERC20("DAIMock", "DAIM") {}
+contract ERC20Mock is ERC20("DAIMock", "DAIM") {
+  function mint(address account, uint256 amount) public {
+    _mint(account, amount);
+  }
+}
diff --git a/contracts/Mocks/MerkleTreeWithHistoryMock.sol b/contracts/Mocks/MerkleTreeWithHistoryMock.sol
index 10e7a6d..b50d499 100644
--- a/contracts/Mocks/MerkleTreeWithHistoryMock.sol
+++ b/contracts/Mocks/MerkleTreeWithHistoryMock.sol
@@ -4,7 +4,7 @@ pragma solidity ^0.6.0;
 import "../MerkleTreeWithHistory.sol";
 
 contract MerkleTreeWithHistoryMock is MerkleTreeWithHistory {
-  constructor(uint32 _treeLevels, Hasher _hasher) public MerkleTreeWithHistory(_treeLevels, _hasher) {}
+  constructor(uint32 _treeLevels, IHasher _hasher) public MerkleTreeWithHistory(_treeLevels, _hasher) {}
 
   function insert(bytes32 _leaf) public {
     _insert(_leaf);
diff --git a/contracts/Tornado.sol b/contracts/Tornado.sol
index 6bc9cf6..baed866 100644
--- a/contracts/Tornado.sol
+++ b/contracts/Tornado.sol
@@ -46,7 +46,7 @@ abstract contract Tornado is MerkleTreeWithHistory, ReentrancyGuard {
   */
   constructor(
     IVerifier _verifier,
-    Hasher _hasher,
+    IHasher _hasher,
     uint256 _denomination,
     uint32 _merkleTreeHeight
   ) public MerkleTreeWithHistory(_merkleTreeHeight, _hasher) {
diff --git a/migrations/4_deploy_eth_tornado.js b/migrations/4_deploy_eth_tornado.js
index 6465f4a..cf00328 100644
--- a/migrations/4_deploy_eth_tornado.js
+++ b/migrations/4_deploy_eth_tornado.js
@@ -2,21 +2,20 @@
 require('dotenv').config({ path: '../.env' })
 const ETHTornado = artifacts.require('ETHTornado')
 const Verifier = artifacts.require('Verifier')
-const hasherContract = artifacts.require('Hasher')
+const Hasher = artifacts.require('Hasher')
 
 module.exports = function (deployer, network, accounts) {
   return deployer.then(async () => {
     const { MERKLE_TREE_HEIGHT, ETH_AMOUNT } = process.env
     const verifier = await Verifier.deployed()
-    const hasherInstance = await hasherContract.deployed()
-    await ETHTornado.link(hasherContract, hasherInstance.address)
+    const hasher = await Hasher.deployed()
     const tornado = await deployer.deploy(
       ETHTornado,
       verifier.address,
+      hasher.address,
       ETH_AMOUNT,
       MERKLE_TREE_HEIGHT,
-      accounts[0],
     )
-    console.log('ETHTornado address ', tornado.address)
+    console.log('ETHTornado address', tornado.address)
   })
 }
diff --git a/migrations/5_deploy_erc20_tornado.js b/migrations/5_deploy_erc20_tornado.js
index 5ba389b..cee9b84 100644
--- a/migrations/5_deploy_erc20_tornado.js
+++ b/migrations/5_deploy_erc20_tornado.js
@@ -2,15 +2,14 @@
 require('dotenv').config({ path: '../.env' })
 const ERC20Tornado = artifacts.require('ERC20Tornado')
 const Verifier = artifacts.require('Verifier')
-const hasherContract = artifacts.require('Hasher')
+const Hasher = artifacts.require('Hasher')
 const ERC20Mock = artifacts.require('ERC20Mock')
 
 module.exports = function (deployer, network, accounts) {
   return deployer.then(async () => {
     const { MERKLE_TREE_HEIGHT, ERC20_TOKEN, TOKEN_AMOUNT } = process.env
     const verifier = await Verifier.deployed()
-    const hasherInstance = await hasherContract.deployed()
-    await ERC20Tornado.link(hasherContract, hasherInstance.address)
+    const hasher = await Hasher.deployed()
     let token = ERC20_TOKEN
     if (token === '') {
       const tokenInstance = await deployer.deploy(ERC20Mock)
@@ -19,11 +18,11 @@ module.exports = function (deployer, network, accounts) {
     const tornado = await deployer.deploy(
       ERC20Tornado,
       verifier.address,
+      hasher.address,
       TOKEN_AMOUNT,
       MERKLE_TREE_HEIGHT,
-      accounts[0],
       token,
     )
-    console.log('ERC20Tornado address ', tornado.address)
+    console.log('ERC20Tornado address', tornado.address)
   })
 }
diff --git a/package.json b/package.json
index 0a4d07c..4fffd2a 100644
--- a/package.json
+++ b/package.json
@@ -52,10 +52,10 @@
     "prettier-plugin-solidity": "^1.0.0-beta.3",
     "snarkjs": "git+https://github.com/tornadocash/snarkjs.git#869181cfaf7526fe8972073d31655493a04326d5",
     "solhint-plugin-prettier": "^0.0.5",
-    "truffle": "^5.0.44",
+    "truffle": "^5.1.65",
     "truffle-flattener": "^1.4.2",
-    "web3": "^1.2.2",
-    "web3-utils": "^1.2.2",
-    "websnark": "git+https://github.com/tornadocash/websnark.git#2041cfa5fa0b71cd5cca9022a4eeea4afe28c9f7"
+    "web3": "^1.3.4",
+    "web3-utils": "^1.3.4",
+    "websnark": "git+https://github.com/tornadocash/websnark.git#4c0af6a8b65aabea3c09f377f63c44e7a58afa6d"
   }
 }
diff --git a/test/ETHTornado.test.js b/test/ETHTornado.test.js
index c5a8bac..70774d9 100644
--- a/test/ETHTornado.test.js
+++ b/test/ETHTornado.test.js
@@ -299,7 +299,7 @@ contract('ETHTornado', (accounts) => {
         toFixedHex(input.refund),
       ]
       const error = await tornado.withdraw(proof, ...args, { from: relayer }).should.be.rejected
-      error.reason.should.be.equal('verifier-gte-snark-scalar-field')
+      error.reason.should.be.equal('verifier-input-gte-snark-scalar-field')
     })
 
     it('fee should be less or equal transfer value', async () => {
@@ -483,50 +483,6 @@ contract('ETHTornado', (accounts) => {
     })
   })
 
-  describe('#changeOperator', () => {
-    it('should work', async () => {
-      let operator = await tornado.operator()
-      operator.should.be.equal(sender)
-
-      const newOperator = accounts[7]
-      await tornado.changeOperator(newOperator).should.be.fulfilled
-
-      operator = await tornado.operator()
-      operator.should.be.equal(newOperator)
-    })
-
-    it('cannot change from different address', async () => {
-      let operator = await tornado.operator()
-      operator.should.be.equal(sender)
-
-      const newOperator = accounts[7]
-      const error = await tornado.changeOperator(newOperator, { from: accounts[7] }).should.be.rejected
-      error.reason.should.be.equal('Only operator can call this function.')
-    })
-  })
-
-  describe('#updateVerifier', () => {
-    it('should work', async () => {
-      let operator = await tornado.operator()
-      operator.should.be.equal(sender)
-
-      const newVerifier = accounts[7]
-      await tornado.updateVerifier(newVerifier).should.be.fulfilled
-
-      const verifier = await tornado.verifier()
-      verifier.should.be.equal(newVerifier)
-    })
-
-    it('cannot change from different address', async () => {
-      let operator = await tornado.operator()
-      operator.should.be.equal(sender)
-
-      const newVerifier = accounts[7]
-      const error = await tornado.updateVerifier(newVerifier, { from: accounts[7] }).should.be.rejected
-      error.reason.should.be.equal('Only operator can call this function.')
-    })
-  })
-
   describe('#isSpent', () => {
     it('should work', async () => {
       const deposit1 = generateDeposit()
diff --git a/test/MerkleTreeWithHistory.test.js b/test/MerkleTreeWithHistory.test.js
index 5ac6ef8..067b0ec 100644
--- a/test/MerkleTreeWithHistory.test.js
+++ b/test/MerkleTreeWithHistory.test.js
@@ -45,8 +45,7 @@ contract('MerkleTreeWithHistory', (accounts) => {
   before(async () => {
     tree = new MerkleTree(levels, null, prefix)
     hasherInstance = await hasherContract.deployed()
-    await MerkleTreeWithHistory.link(hasherContract, hasherInstance.address)
-    merkleTreeWithHistory = await MerkleTreeWithHistory.new(levels)
+    merkleTreeWithHistory = await MerkleTreeWithHistory.new(levels, hasherInstance.address)
     snapshotId = await takeSnapshot()
   })
 
@@ -153,7 +152,7 @@ contract('MerkleTreeWithHistory', (accounts) => {
 
     it('should reject if tree is full', async () => {
       const levels = 6
-      const merkleTreeWithHistory = await MerkleTreeWithHistory.new(levels)
+      const merkleTreeWithHistory = await MerkleTreeWithHistory.new(levels, hasherInstance.address)
 
       for (let i = 0; i < 2 ** levels; i++) {
         await merkleTreeWithHistory.insert(toFixedHex(i + 42)).should.be.fulfilled
diff --git a/yarn.lock b/yarn.lock
index b69d825..2961d9e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5862,10 +5862,10 @@ truffle-flattener@^1.4.2:
     mkdirp "^1.0.4"
     tsort "0.0.1"
 
-truffle@^5.0.44:
-  version "5.1.62"
-  resolved "https://registry.yarnpkg.com/truffle/-/truffle-5.1.62.tgz#819b8280615345bf42bbba7967f2dc9d39347869"
-  integrity sha512-TWgZ3xSSb8us4ZkHEHRghJWivfewjEy7yd8nARd7EHvoOi5lcUmKnbsunP+G7u/AO47gRoEqwFdPuGPdXrBM1A==
+truffle@^5.1.65:
+  version "5.1.65"
+  resolved "https://registry.yarnpkg.com/truffle/-/truffle-5.1.65.tgz#2f31dc9481c74d04c4d72cfb3085f6ee9752d0d2"
+  integrity sha512-MT7kTrMP1tleqwEzGWj/4wKU3pIOR63cVGsrP0MgEDrXOrpM5XNHnCAp9YBrYsDXqiVPZiEK38385qoJdTk6yA==
   dependencies:
     app-module-path "^2.2.0"
     mocha "8.1.2"
@@ -6144,6 +6144,16 @@ web3-bzz@1.3.1:
     swarm-js "^0.1.40"
     underscore "1.9.1"
 
+web3-bzz@1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/web3-bzz/-/web3-bzz-1.3.4.tgz#9be529353c4063bc68395370cb5d8e414c6b6c87"
+  integrity sha512-DBRVQB8FAgoAtZCpp2GAGPCJjgBgsuwOKEasjV044AAZiONpXcKHbkO6G1SgItIixnrJsRJpoGLGw52Byr6FKw==
+  dependencies:
+    "@types/node" "^12.12.6"
+    got "9.6.0"
+    swarm-js "^0.1.40"
+    underscore "1.9.1"
+
 web3-core-helpers@1.2.9:
   version "1.2.9"
   resolved "https://registry.yarnpkg.com/web3-core-helpers/-/web3-core-helpers-1.2.9.tgz#6381077c3e01c127018cb9e9e3d1422697123315"
@@ -6162,6 +6172,15 @@ web3-core-helpers@1.3.1:
     web3-eth-iban "1.3.1"
     web3-utils "1.3.1"
 
+web3-core-helpers@1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/web3-core-helpers/-/web3-core-helpers-1.3.4.tgz#b8549740bf24d5c71688d89c3cdd802d8d36b4e4"
+  integrity sha512-n7BqDalcTa1stncHMmrnFtyTgDhX5Fy+avNaHCf6qcOP2lwTQC8+mdHVBONWRJ6Yddvln+c8oY/TAaB6PzWK0A==
+  dependencies:
+    underscore "1.9.1"
+    web3-eth-iban "1.3.4"
+    web3-utils "1.3.4"
+
 web3-core-method@1.2.9:
   version "1.2.9"
   resolved "https://registry.yarnpkg.com/web3-core-method/-/web3-core-method-1.2.9.tgz#3fb538751029bea570e4f86731e2fa5e4945e462"
@@ -6186,6 +6205,18 @@ web3-core-method@1.3.1:
     web3-core-subscriptions "1.3.1"
     web3-utils "1.3.1"
 
+web3-core-method@1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/web3-core-method/-/web3-core-method-1.3.4.tgz#6c2812d96dd6c811b9e6c8a5d25050d2c22b9527"
+  integrity sha512-JxmQrujsAWYRRN77P/RY7XuZDCzxSiiQJrgX/60Lfyf7FF1Y0le4L/UMCi7vUJnuYkbU1Kfl9E0udnqwyPqlvQ==
+  dependencies:
+    "@ethersproject/transactions" "^5.0.0-beta.135"
+    underscore "1.9.1"
+    web3-core-helpers "1.3.4"
+    web3-core-promievent "1.3.4"
+    web3-core-subscriptions "1.3.4"
+    web3-utils "1.3.4"
+
 web3-core-promievent@1.2.9:
   version "1.2.9"
   resolved "https://registry.yarnpkg.com/web3-core-promievent/-/web3-core-promievent-1.2.9.tgz#bb1c56aa6fac2f4b3c598510f06554d25c11c553"
@@ -6200,6 +6231,13 @@ web3-core-promievent@1.3.1:
   dependencies:
     eventemitter3 "4.0.4"
 
+web3-core-promievent@1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/web3-core-promievent/-/web3-core-promievent-1.3.4.tgz#d166239012d91496cdcbe91d5d54071ea818bc73"
+  integrity sha512-V61dZIeBwogg6hhZZUt0qL9hTp1WDhnsdjP++9fhTDr4vy/Gz8T5vibqT2LLg6lQC8i+Py33yOpMeMNjztaUaw==
+  dependencies:
+    eventemitter3 "4.0.4"
+
 web3-core-requestmanager@1.2.9:
   version "1.2.9"
   resolved "https://registry.yarnpkg.com/web3-core-requestmanager/-/web3-core-requestmanager-1.2.9.tgz#dd6d855256c4dd681434fe0867f8cd742fe10503"
@@ -6223,6 +6261,18 @@ web3-core-requestmanager@1.3.1:
     web3-providers-ipc "1.3.1"
     web3-providers-ws "1.3.1"
 
+web3-core-requestmanager@1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/web3-core-requestmanager/-/web3-core-requestmanager-1.3.4.tgz#e105ced735c2b5fcedd5771e0ecf9879ae9c373f"
+  integrity sha512-xriouCrhVnVDYQ04TZXdEREZm0OOJzkSEsoN5bu4JYsA6e/HzROeU+RjDpMUxFMzN4wxmFZ+HWbpPndS3QwMag==
+  dependencies:
+    underscore "1.9.1"
+    util "^0.12.0"
+    web3-core-helpers "1.3.4"
+    web3-providers-http "1.3.4"
+    web3-providers-ipc "1.3.4"
+    web3-providers-ws "1.3.4"
+
 web3-core-subscriptions@1.2.9:
   version "1.2.9"
   resolved "https://registry.yarnpkg.com/web3-core-subscriptions/-/web3-core-subscriptions-1.2.9.tgz#335fd7d15dfce5d78b4b7bef05ce4b3d7237b0e4"
@@ -6241,6 +6291,15 @@ web3-core-subscriptions@1.3.1:
     underscore "1.9.1"
     web3-core-helpers "1.3.1"
 
+web3-core-subscriptions@1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/web3-core-subscriptions/-/web3-core-subscriptions-1.3.4.tgz#7b00e92bde21f792620cd02e6e508fcf4f4c31d3"
+  integrity sha512-drVHVDxh54hv7xmjIm44g4IXjfGj022fGw4/meB5R2D8UATFI40F73CdiBlyqk3DysP9njDOLTJFSQvEkLFUOg==
+  dependencies:
+    eventemitter3 "4.0.4"
+    underscore "1.9.1"
+    web3-core-helpers "1.3.4"
+
 web3-core@1.2.9:
   version "1.2.9"
   resolved "https://registry.yarnpkg.com/web3-core/-/web3-core-1.2.9.tgz#2cba57aa259b6409db532d21bdf57db8d504fd3e"
@@ -6267,6 +6326,19 @@ web3-core@1.3.1:
     web3-core-requestmanager "1.3.1"
     web3-utils "1.3.1"
 
+web3-core@1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/web3-core/-/web3-core-1.3.4.tgz#2cc7ba7f35cc167f7a0a46fd5855f86e51d34ce8"
+  integrity sha512-7OJu46RpCEfTerl+gPvHXANR2RkLqAfW7l2DAvQ7wN0pnCzl9nEfdgW6tMhr31k3TR2fWucwKzCyyxMGzMHeSA==
+  dependencies:
+    "@types/bn.js" "^4.11.5"
+    "@types/node" "^12.12.6"
+    bignumber.js "^9.0.0"
+    web3-core-helpers "1.3.4"
+    web3-core-method "1.3.4"
+    web3-core-requestmanager "1.3.4"
+    web3-utils "1.3.4"
+
 web3-eth-abi@1.2.9:
   version "1.2.9"
   resolved "https://registry.yarnpkg.com/web3-eth-abi/-/web3-eth-abi-1.2.9.tgz#14bedd7e4be04fcca35b2ac84af1400574cd8280"
@@ -6285,6 +6357,15 @@ web3-eth-abi@1.3.1:
     underscore "1.9.1"
     web3-utils "1.3.1"
 
+web3-eth-abi@1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/web3-eth-abi/-/web3-eth-abi-1.3.4.tgz#10f5d8b6080dbb6cbaa1bcef7e0c70573da6566f"
+  integrity sha512-PVSLXJ2dzdXsC+R24llIIEOS6S1KhG5qwNznJjJvXZFe3sqgdSe47eNvwUamZtCBjcrdR/HQr+L/FTxqJSf80Q==
+  dependencies:
+    "@ethersproject/abi" "5.0.7"
+    underscore "1.9.1"
+    web3-utils "1.3.4"
+
 web3-eth-accounts@1.2.9:
   version "1.2.9"
   resolved "https://registry.yarnpkg.com/web3-eth-accounts/-/web3-eth-accounts-1.2.9.tgz#7ec422df90fecb5243603ea49dc28726db7bdab6"
@@ -6319,6 +6400,23 @@ web3-eth-accounts@1.3.1:
     web3-core-method "1.3.1"
     web3-utils "1.3.1"
 
+web3-eth-accounts@1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/web3-eth-accounts/-/web3-eth-accounts-1.3.4.tgz#cf513d78531c13ce079a5e7862820570350e79a5"
+  integrity sha512-gz9ReSmQEjqbYAjpmAx+UZF4CVMbyS4pfjSYWGAnNNI+Xz0f0u0kCIYXQ1UEaE+YeLcYiE+ZlZdgg6YoatO5nA==
+  dependencies:
+    crypto-browserify "3.12.0"
+    eth-lib "0.2.8"
+    ethereumjs-common "^1.3.2"
+    ethereumjs-tx "^2.1.1"
+    scrypt-js "^3.0.1"
+    underscore "1.9.1"
+    uuid "3.3.2"
+    web3-core "1.3.4"
+    web3-core-helpers "1.3.4"
+    web3-core-method "1.3.4"
+    web3-utils "1.3.4"
+
 web3-eth-contract@1.2.9:
   version "1.2.9"
   resolved "https://registry.yarnpkg.com/web3-eth-contract/-/web3-eth-contract-1.2.9.tgz#713d9c6d502d8c8f22b696b7ffd8e254444e6bfd"
@@ -6349,6 +6447,21 @@ web3-eth-contract@1.3.1:
     web3-eth-abi "1.3.1"
     web3-utils "1.3.1"
 
+web3-eth-contract@1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/web3-eth-contract/-/web3-eth-contract-1.3.4.tgz#1ea2dd71be0c4a9cf4772d4f75dbb2fa99751472"
+  integrity sha512-Fvy8ZxUksQY2ePt+XynFfOiSqxgQtMn4m2NJs6VXRl2Inl17qyRi/nIJJVKTcENLocm+GmZ/mxq2eOE5u02nPg==
+  dependencies:
+    "@types/bn.js" "^4.11.5"
+    underscore "1.9.1"
+    web3-core "1.3.4"
+    web3-core-helpers "1.3.4"
+    web3-core-method "1.3.4"
+    web3-core-promievent "1.3.4"
+    web3-core-subscriptions "1.3.4"
+    web3-eth-abi "1.3.4"
+    web3-utils "1.3.4"
+
 web3-eth-ens@1.2.9:
   version "1.2.9"
   resolved "https://registry.yarnpkg.com/web3-eth-ens/-/web3-eth-ens-1.2.9.tgz#577b9358c036337833fb2bdc59c11be7f6f731b6"
@@ -6379,6 +6492,21 @@ web3-eth-ens@1.3.1:
     web3-eth-contract "1.3.1"
     web3-utils "1.3.1"
 
+web3-eth-ens@1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/web3-eth-ens/-/web3-eth-ens-1.3.4.tgz#a7e4bb18481fb0e2ce5bfb3b3da2fbb0ad78cefe"
+  integrity sha512-b0580tQyQwpV2wyacwQiBEfQmjCUln5iPhge3IBIMXaI43BUNtH3lsCL9ERFQeOdweB4o+6rYyNYr6xbRcSytg==
+  dependencies:
+    content-hash "^2.5.2"
+    eth-ens-namehash "2.0.8"
+    underscore "1.9.1"
+    web3-core "1.3.4"
+    web3-core-helpers "1.3.4"
+    web3-core-promievent "1.3.4"
+    web3-eth-abi "1.3.4"
+    web3-eth-contract "1.3.4"
+    web3-utils "1.3.4"
+
 web3-eth-iban@1.2.9:
   version "1.2.9"
   resolved "https://registry.yarnpkg.com/web3-eth-iban/-/web3-eth-iban-1.2.9.tgz#4ebf3d8783f34d04c4740dc18938556466399f7a"
@@ -6395,6 +6523,14 @@ web3-eth-iban@1.3.1:
     bn.js "^4.11.9"
     web3-utils "1.3.1"
 
+web3-eth-iban@1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/web3-eth-iban/-/web3-eth-iban-1.3.4.tgz#5eb7a564e0dcf68730d68f48f95dd207cd173d81"
+  integrity sha512-Y7/hLjVvIN/OhaAyZ8L/hxbTqVX6AFTl2RwUXR6EEU9oaLydPcMjAx/Fr8mghUvQS3QJSr+UGubP3W4SkyNiYw==
+  dependencies:
+    bn.js "^4.11.9"
+    web3-utils "1.3.4"
+
 web3-eth-personal@1.2.9:
   version "1.2.9"
   resolved "https://registry.yarnpkg.com/web3-eth-personal/-/web3-eth-personal-1.2.9.tgz#9b95eb159b950b83cd8ae15873e1d57711b7a368"
@@ -6419,6 +6555,18 @@ web3-eth-personal@1.3.1:
     web3-net "1.3.1"
     web3-utils "1.3.1"
 
+web3-eth-personal@1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/web3-eth-personal/-/web3-eth-personal-1.3.4.tgz#0d0e0abea3447283d7ee5658ed312990c9bf48dd"
+  integrity sha512-JiTbaktYVk1j+S2EDooXAhw5j/VsdvZfKRmHtXUe/HizPM9ETXmj1+ne4RT6m+950jQ7DJwUF3XU1FKYNtEDwQ==
+  dependencies:
+    "@types/node" "^12.12.6"
+    web3-core "1.3.4"
+    web3-core-helpers "1.3.4"
+    web3-core-method "1.3.4"
+    web3-net "1.3.4"
+    web3-utils "1.3.4"
+
 web3-eth@1.2.9:
   version "1.2.9"
   resolved "https://registry.yarnpkg.com/web3-eth/-/web3-eth-1.2.9.tgz#e40e7b88baffc9b487193211c8b424dc944977b3"
@@ -6457,6 +6605,25 @@ web3-eth@1.3.1:
     web3-net "1.3.1"
     web3-utils "1.3.1"
 
+web3-eth@1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/web3-eth/-/web3-eth-1.3.4.tgz#7c4607685e66a1c43e3e315e526c959f24f96907"
+  integrity sha512-8OIVMLbvmx+LB5RZ4tDhXuFGWSdNMrCZ4HM0+PywQ08uEcmAcqTMFAn4vdPii+J8gCatZR501r1KdzX3SDLoPw==
+  dependencies:
+    underscore "1.9.1"
+    web3-core "1.3.4"
+    web3-core-helpers "1.3.4"
+    web3-core-method "1.3.4"
+    web3-core-subscriptions "1.3.4"
+    web3-eth-abi "1.3.4"
+    web3-eth-accounts "1.3.4"
+    web3-eth-contract "1.3.4"
+    web3-eth-ens "1.3.4"
+    web3-eth-iban "1.3.4"
+    web3-eth-personal "1.3.4"
+    web3-net "1.3.4"
+    web3-utils "1.3.4"
+
 web3-net@1.2.9:
   version "1.2.9"
   resolved "https://registry.yarnpkg.com/web3-net/-/web3-net-1.2.9.tgz#51d248ed1bc5c37713c4ac40c0073d9beacd87d3"
@@ -6475,6 +6642,15 @@ web3-net@1.3.1:
     web3-core-method "1.3.1"
     web3-utils "1.3.1"
 
+web3-net@1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/web3-net/-/web3-net-1.3.4.tgz#d76158bf0b4a7b3b14352b4f95472db9efc57a2a"
+  integrity sha512-wVyqgVC3Zt/0uGnBiR3GpnsS8lvOFTDgWZMxAk9C6Guh8aJD9MUc7pbsw5rHrPUVe6S6RUfFJvh/Xq8oMIQgSw==
+  dependencies:
+    web3-core "1.3.4"
+    web3-core-method "1.3.4"
+    web3-utils "1.3.4"
+
 web3-providers-http@1.2.9:
   version "1.2.9"
   resolved "https://registry.yarnpkg.com/web3-providers-http/-/web3-providers-http-1.2.9.tgz#e698aa5377e2019c24c5a1e6efa0f51018728934"
@@ -6491,6 +6667,14 @@ web3-providers-http@1.3.1:
     web3-core-helpers "1.3.1"
     xhr2-cookies "1.1.0"
 
+web3-providers-http@1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/web3-providers-http/-/web3-providers-http-1.3.4.tgz#89389e18e27148faa2fef58842740ffadbdda8cc"
+  integrity sha512-aIg/xHXvxpqpFU70sqfp+JC3sGkLfAimRKTUhG4oJZ7U+tTcYTHoxBJj+4A3Id4JAoKiiv0k1/qeyQ8f3rMC3g==
+  dependencies:
+    web3-core-helpers "1.3.4"
+    xhr2-cookies "1.1.0"
+
 web3-providers-ipc@1.2.9:
   version "1.2.9"
   resolved "https://registry.yarnpkg.com/web3-providers-ipc/-/web3-providers-ipc-1.2.9.tgz#6159eacfcd7ac31edc470d93ef10814fe874763b"
@@ -6509,6 +6693,15 @@ web3-providers-ipc@1.3.1:
     underscore "1.9.1"
     web3-core-helpers "1.3.1"
 
+web3-providers-ipc@1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/web3-providers-ipc/-/web3-providers-ipc-1.3.4.tgz#b963518989b1b7847063cdd461ff73b83855834a"
+  integrity sha512-E0CvXEJElr/TIlG1YfJeO3Le5NI/4JZM+1SsEdiPIfBUAJN18oOoum138EBGKv5+YaLKZUtUuJSXWjIIOR/0Ig==
+  dependencies:
+    oboe "2.1.5"
+    underscore "1.9.1"
+    web3-core-helpers "1.3.4"
+
 web3-providers-ws@1.2.9:
   version "1.2.9"
   resolved "https://registry.yarnpkg.com/web3-providers-ws/-/web3-providers-ws-1.2.9.tgz#22c2006655ec44b4ad2b41acae62741a6ae7a88c"
@@ -6529,6 +6722,16 @@ web3-providers-ws@1.3.1:
     web3-core-helpers "1.3.1"
     websocket "^1.0.32"
 
+web3-providers-ws@1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/web3-providers-ws/-/web3-providers-ws-1.3.4.tgz#b94c2e0ec51a0c472abdec53a472b5bf8176bec1"
+  integrity sha512-WBd9hk2fUAdrbA3kUyUk94ZeILtE6txLeoVVvIKAw2bPegx+RjkLyxC1Du0oceKgQ/qQWod8CCzl1E/GgTP+MQ==
+  dependencies:
+    eventemitter3 "4.0.4"
+    underscore "1.9.1"
+    web3-core-helpers "1.3.4"
+    websocket "^1.0.32"
+
 web3-shh@1.2.9:
   version "1.2.9"
   resolved "https://registry.yarnpkg.com/web3-shh/-/web3-shh-1.2.9.tgz#c4ba70d6142cfd61341a50752d8cace9a0370911"
@@ -6549,6 +6752,16 @@ web3-shh@1.3.1:
     web3-core-subscriptions "1.3.1"
     web3-net "1.3.1"
 
+web3-shh@1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/web3-shh/-/web3-shh-1.3.4.tgz#b7d29e118f26416c1a74575e585be379cc01a77a"
+  integrity sha512-zoeww5mxLh3xKcqbX85irQbtFe5pc5XwrgjvmdMkhkOdZzPASlWOgqzUFtaPykpLwC3yavVx4jG5RqifweXLUA==
+  dependencies:
+    web3-core "1.3.4"
+    web3-core-method "1.3.4"
+    web3-core-subscriptions "1.3.4"
+    web3-net "1.3.4"
+
 web3-utils@1.2.9:
   version "1.2.9"
   resolved "https://registry.yarnpkg.com/web3-utils/-/web3-utils-1.2.9.tgz#abe11735221627da943971ef1a630868fb9c61f3"
@@ -6563,7 +6776,7 @@ web3-utils@1.2.9:
     underscore "1.9.1"
     utf8 "3.0.0"
 
-web3-utils@1.3.1, web3-utils@^1.2.2:
+web3-utils@1.3.1:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/web3-utils/-/web3-utils-1.3.1.tgz#9aa880dd8c9463fe5c099107889f86a085370c2e"
   integrity sha512-9gPwFm8SXtIJuzdrZ37PRlalu40fufXxo+H2PiCwaO6RpKGAvlUlWU0qQbyToFNXg7W2H8djEgoAVac8NLMCKQ==
@@ -6577,7 +6790,21 @@ web3-utils@1.3.1, web3-utils@^1.2.2:
     underscore "1.9.1"
     utf8 "3.0.0"
 
-web3@*, web3@^1.0.0-beta.34, web3@^1.0.0-beta.55, web3@^1.2.2:
+web3-utils@1.3.4, web3-utils@^1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/web3-utils/-/web3-utils-1.3.4.tgz#9b1aa30d7549f860b573e7bb7e690999e7192198"
+  integrity sha512-/vC2v0MaZNpWooJfpRw63u0Y3ag2gNjAWiLtMSL6QQLmCqCy4SQIndMt/vRyx0uMoeGt1YTwSXEcHjUzOhLg0A==
+  dependencies:
+    bn.js "^4.11.9"
+    eth-lib "0.2.8"
+    ethereum-bloom-filters "^1.0.6"
+    ethjs-unit "0.1.6"
+    number-to-bn "1.7.0"
+    randombytes "^2.1.0"
+    underscore "1.9.1"
+    utf8 "3.0.0"
+
+web3@*, web3@^1.0.0-beta.34, web3@^1.0.0-beta.55:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/web3/-/web3-1.3.1.tgz#f780138c92ae3c42ea45e1a3c6ae8844e0aa5054"
   integrity sha512-lDJwOLSRWHYwhPy4h5TNgBRJ/lED7lWXyVOXHCHcEC8ai3coBNdgEXWBu/GGYbZMsS89EoUOJ14j3Ufi4dUkog==
@@ -6603,9 +6830,22 @@ web3@1.2.9:
     web3-shh "1.2.9"
     web3-utils "1.2.9"
 
-"websnark@git+https://github.com/tornadocash/websnark.git#2041cfa5fa0b71cd5cca9022a4eeea4afe28c9f7":
+web3@^1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/web3/-/web3-1.3.4.tgz#31e014873360aa5840eb17f9f171190c967cffb7"
+  integrity sha512-D6cMb2EtTMLHgdGbkTPGl/Qi7DAfczR+Lp7iFX3bcu/bsD9V8fZW69hA8v5cRPNGzXUwVQebk3bS17WKR4cD2w==
+  dependencies:
+    web3-bzz "1.3.4"
+    web3-core "1.3.4"
+    web3-eth "1.3.4"
+    web3-eth-personal "1.3.4"
+    web3-net "1.3.4"
+    web3-shh "1.3.4"
+    web3-utils "1.3.4"
+
+"websnark@git+https://github.com/tornadocash/websnark.git#4c0af6a8b65aabea3c09f377f63c44e7a58afa6d":
   version "0.0.4"
-  resolved "git+https://github.com/tornadocash/websnark.git#2041cfa5fa0b71cd5cca9022a4eeea4afe28c9f7"
+  resolved "git+https://github.com/tornadocash/websnark.git#4c0af6a8b65aabea3c09f377f63c44e7a58afa6d"
   dependencies:
     big-integer "^1.6.42"