diff --git a/index.js b/index.js
index b9f905a..54cd839 100644
--- a/index.js
+++ b/index.js
@@ -6,7 +6,7 @@ const Kredits = require('kredits-contracts');
 
 const walletPath  = process.env.KREDITS_WALLET_PATH || './wallet.json';
 const walletJson  = fs.readFileSync(walletPath);
-const providerUrl = process.env.KREDITS_PROVIDER_URL || 'http://localhost:7545';
+const providerUrl = process.env.KREDITS_PROVIDER_URL;
 const networkId = parseInt(process.env.KREDITS_NETWORK_ID || 100);
 
 const ipfsConfig = {
@@ -27,9 +27,9 @@ module.exports = async function(robot) {
 
   let wallet;
   try {
-    wallet = await ethers.Wallet.fromEncryptedWallet(walletJson, process.env.KREDITS_WALLET_PASSWORD);
+    wallet = await ethers.Wallet.fromEncryptedJson(walletJson, process.env.KREDITS_WALLET_PASSWORD);
   } catch(error) {
-    robot.logger.warn('[hubot-kredits] Could not load wallet:', error);
+    robot.logger.warning('[hubot-kredits] Could not load wallet:', error);
     process.exit(1);
   }
 
@@ -37,9 +37,13 @@ module.exports = async function(robot) {
   // Ethereum provider/node setup
   //
 
-  const ethProvider = new ethers.providers.JsonRpcProvider(providerUrl, {chainId: networkId});
-  ethProvider.signer = wallet;
-  wallet.provider = ethProvider;
+  let ethProvider;
+  if (providerUrl) {
+    ethProvider = new ethers.providers.JsonRpcProvider(providerUrl);
+  } else {
+    ethProvider = new ethers.getDefaultProvider('rinkeby');
+  }
+  const signer = wallet.connect(ethProvider);
 
   //
   // Kredits contracts setup
@@ -47,13 +51,18 @@ module.exports = async function(robot) {
 
   let kredits;
   try {
-    kredits = await Kredits.setup(ethProvider, wallet, ipfsConfig);
+    kredits = await new Kredits(signer.provider, signer, {
+      // TODO support local devchain custom address
+      apm: 'open.aragonpm.eth',
+      ipfsConfig
+    }).init();
   } catch(error) {
-    robot.logger.warn('[hubot-kredits] Could not set up kredits:', error);
+    robot.logger.warning('[hubot-kredits] Could not set up kredits:', error);
     process.exit(1);
   }
   const Contributor = kredits.Contributor;
-  const Operator = kredits.Operator;
+  const Proposal = kredits.Proposal;
+  const Contribution = kredits.Contribution;
 
   robot.logger.info('[hubot-kredits] Wallet address: ' + wallet.address);
 
@@ -74,7 +83,7 @@ module.exports = async function(robot) {
 
   robot.respond(/got ETH\??/i, res => {
     ethProvider.getBalance(wallet.address).then((balance) => {
-      res.send(`my wallet contains ${ethers.utils.formatEther(balance)} ETH`);
+      res.send(`My wallet contains ${ethers.utils.formatEther(balance)} ETH`);
     });
   });
 
@@ -87,7 +96,7 @@ module.exports = async function(robot) {
   });
 
   robot.respond(/list open proposals/i, res => {
-    Operator.all().then((proposals) => {
+    Proposal.all().then((proposals) => {
       proposals.forEach((proposal) => {
         if (!proposal.executed) {
           Contributor.getById(proposal.contributorId).then((contributor) => {
@@ -111,13 +120,13 @@ module.exports = async function(robot) {
       robot.logger.debug(`[hubot-kredits] Watching events from block ${nextBlock} onward`);
       ethProvider.resetEventsBlock(nextBlock);
 
-      Operator.on('ProposalCreated', handleProposalCreated);
+      Proposal.on('ProposalCreated', handleProposalCreated);
     });
   }
 
   function handleProposalCreated(proposalId, creatorAccount, contributorId, amount) {
     Contributor.getById(contributorId).then((contributor) => {
-      Operator.getById(proposalId).then((proposal) => {
+      Proposal.getById(proposalId).then((proposal) => {
         robot.logger.debug(`[hubot-kredits] Proposal created (${proposal.description})`);
         // messageRoom(`Let's give ${contributor.name} some kredits for ${proposal.url} (${proposal.description}): https://kredits.kosmos.org`);
       });
diff --git a/integrations/github.js b/integrations/github.js
index 44366e9..053ac64 100644
--- a/integrations/github.js
+++ b/integrations/github.js
@@ -16,7 +16,8 @@ module.exports = async function(robot, kredits) {
   }
 
   const Contributor = kredits.Contributor;
-  const Operator = kredits.Operator;
+  const Proposal = kredits.Proposal;
+  const Contribution = kredits.Contribution;
 
   function getContributorByGithubUser(username) {
     return Contributor.all().then(contributors => {
@@ -45,7 +46,7 @@ module.exports = async function(robot, kredits) {
         kind: 'dev'
       };
 
-      return Operator.addProposal(contributionAttr).catch(error => {
+      return Proposal.addProposal(contributionAttr).catch(error => {
         robot.logger.error(`[hubot-kredits] Error:`, error);
         messageRoom(`I wanted to propose giving kredits to GitHub user ${githubUser} for ${url}, but I cannot find their info. Please add them as a contributor: https://kredits.kosmos.org`);
       });
diff --git a/integrations/mediawiki.js b/integrations/mediawiki.js
index 0df6605..8acd394 100644
--- a/integrations/mediawiki.js
+++ b/integrations/mediawiki.js
@@ -13,7 +13,8 @@ module.exports = async function(robot, kredits) {
   robot.logger.debug('[hubot-kredits] Loading MediaWiki integration...')
 
   const Contributor = kredits.Contributor;
-  const Operator = kredits.Operator;
+  const Proposal = kredits.Proposal;
+  const Contribution = kredits.Contribution;
 
   const wikiURL = process.env.KREDITS_MEDIAWIKI_URL;
   const apiURL =  wikiURL + 'api.php';
@@ -43,7 +44,7 @@ module.exports = async function(robot, kredits) {
         kind: 'docs'
       };
 
-      return Operator.addProposal(contribution).catch(error => {
+      return Proposal.addProposal(contribution).catch(error => {
         robot.logger.error(`[hubot-kredits] Adding proposal failed:`, error);
       });
     }).catch(() => {
diff --git a/package-lock.json b/package-lock.json
index 820c0b0..e86faff 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,11 @@
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "@types/node": {
+      "version": "10.14.4",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-10.14.4.tgz",
+      "integrity": "sha512-DT25xX/YgyPKiHFOpNuANIQIVvYEwCWXgK2jYYwqgaMrYE6+tq+DtmMwlD3drl6DJbUwtlIDnn0d7tIn/EbXBg=="
+    },
     "aes-js": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/aes-js/-/aes-js-3.0.0.tgz",
@@ -29,32 +34,49 @@
       "resolved": "https://registry.npmjs.org/arr-union/-/arr-union-3.1.0.tgz",
       "integrity": "sha1-45sJrqne+Gao8gbiiK9jkZuuOcQ="
     },
+    "asmcrypto.js": {
+      "version": "2.3.2",
+      "resolved": "https://registry.npmjs.org/asmcrypto.js/-/asmcrypto.js-2.3.2.tgz",
+      "integrity": "sha512-3FgFARf7RupsZETQ1nHnhLUUvpcttcCq1iZCaVAbJZbCZ5VNRrNyvpDyHTOb0KC3llFcsyOT/a99NZcCbeiEsA=="
+    },
     "asn1.js": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmjs.org/asn1.js/-/asn1.js-5.0.0.tgz",
-      "integrity": "sha512-Y+FKviD0uyIWWo/xE0XkUl0x1allKFhzEVJ+//2Dgqpy+n+B77MlPNqvyk7Vx50M9XyVzjnRhDqJAEAsyivlbA==",
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/asn1.js/-/asn1.js-5.0.1.tgz",
+      "integrity": "sha512-aO8EaEgbgqq77IEw+1jfx5c9zTbzvkfuRBuZsSsPnTHMkmd5AI4J6OtITLZFa381jReeaQL67J0GBTUu0+ZTVw==",
       "requires": {
-        "bn.js": "4.11.8",
-        "inherits": "2.0.3",
-        "minimalistic-assert": "1.0.0"
+        "bn.js": "^4.0.0",
+        "inherits": "^2.0.1",
+        "minimalistic-assert": "^1.0.0"
       }
     },
     "async": {
-      "version": "2.6.0",
-      "resolved": "https://registry.npmjs.org/async/-/async-2.6.0.tgz",
-      "integrity": "sha512-xAfGg1/NTLBBKlHFmnd7PlmUW9KhVQIUuSrYem9xzFUZy13ScvtyGGejaae9iAVRiRq9+Cx7DPFaAAhCpyxyPw==",
+      "version": "2.6.2",
+      "resolved": "https://registry.npmjs.org/async/-/async-2.6.2.tgz",
+      "integrity": "sha512-H1qVYh1MYhEEFLsP97cVKqCGo7KfCyTt6uEWqsTBr9SO84oK9Uwbyd/yCW+6rKJLHksBNUVWZDAjfS+Ccx0Bbg==",
       "requires": {
-        "lodash": "4.17.4"
+        "lodash": "^4.17.11"
+      },
+      "dependencies": {
+        "lodash": {
+          "version": "4.17.11",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.11.tgz",
+          "integrity": "sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg=="
+        }
       }
     },
+    "async-limiter": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.0.tgz",
+      "integrity": "sha512-jp/uFnooOiO+L211eZOoSyzpOITMXx1rBITauYykG3BRYPu8h0UcxsPNB04RR5vo4Tyz3+ay17tR6JVf9qzYWg=="
+    },
     "babel-code-frame": {
       "version": "6.22.0",
       "resolved": "https://registry.npmjs.org/babel-code-frame/-/babel-code-frame-6.22.0.tgz",
       "integrity": "sha1-AnYgvuVnqIwyVhV05/0IAdMxGOQ=",
       "requires": {
-        "chalk": "1.1.3",
-        "esutils": "2.0.2",
-        "js-tokens": "3.0.2"
+        "chalk": "^1.1.0",
+        "esutils": "^2.0.2",
+        "js-tokens": "^3.0.0"
       },
       "dependencies": {
         "esutils": {
@@ -69,25 +91,25 @@
       "resolved": "https://registry.npmjs.org/babel-core/-/babel-core-6.25.0.tgz",
       "integrity": "sha1-fdQrBGPHQunVKW3rPsZ6kyLa1yk=",
       "requires": {
-        "babel-code-frame": "6.22.0",
-        "babel-generator": "6.25.0",
-        "babel-helpers": "6.24.1",
-        "babel-messages": "6.23.0",
-        "babel-register": "6.24.1",
-        "babel-runtime": "6.25.0",
-        "babel-template": "6.25.0",
-        "babel-traverse": "6.25.0",
-        "babel-types": "6.25.0",
-        "babylon": "6.17.4",
-        "convert-source-map": "1.5.0",
-        "debug": "2.6.8",
-        "json5": "0.5.1",
-        "lodash": "4.17.4",
-        "minimatch": "3.0.4",
-        "path-is-absolute": "1.0.1",
-        "private": "0.1.7",
-        "slash": "1.0.0",
-        "source-map": "0.5.6"
+        "babel-code-frame": "^6.22.0",
+        "babel-generator": "^6.25.0",
+        "babel-helpers": "^6.24.1",
+        "babel-messages": "^6.23.0",
+        "babel-register": "^6.24.1",
+        "babel-runtime": "^6.22.0",
+        "babel-template": "^6.25.0",
+        "babel-traverse": "^6.25.0",
+        "babel-types": "^6.25.0",
+        "babylon": "^6.17.2",
+        "convert-source-map": "^1.1.0",
+        "debug": "^2.1.1",
+        "json5": "^0.5.0",
+        "lodash": "^4.2.0",
+        "minimatch": "^3.0.2",
+        "path-is-absolute": "^1.0.0",
+        "private": "^0.1.6",
+        "slash": "^1.0.0",
+        "source-map": "^0.5.0"
       },
       "dependencies": {
         "source-map": {
@@ -102,14 +124,14 @@
       "resolved": "https://registry.npmjs.org/babel-generator/-/babel-generator-6.25.0.tgz",
       "integrity": "sha1-M6GvcNXyiQrrRlpKd5PB32qeqfw=",
       "requires": {
-        "babel-messages": "6.23.0",
-        "babel-runtime": "6.25.0",
-        "babel-types": "6.25.0",
-        "detect-indent": "4.0.0",
-        "jsesc": "1.3.0",
-        "lodash": "4.17.4",
-        "source-map": "0.5.6",
-        "trim-right": "1.0.1"
+        "babel-messages": "^6.23.0",
+        "babel-runtime": "^6.22.0",
+        "babel-types": "^6.25.0",
+        "detect-indent": "^4.0.0",
+        "jsesc": "^1.3.0",
+        "lodash": "^4.2.0",
+        "source-map": "^0.5.0",
+        "trim-right": "^1.0.1"
       },
       "dependencies": {
         "source-map": {
@@ -124,8 +146,8 @@
       "resolved": "https://registry.npmjs.org/babel-helpers/-/babel-helpers-6.24.1.tgz",
       "integrity": "sha1-NHHenK7DiOXIUOWX5Yom3fN2ArI=",
       "requires": {
-        "babel-runtime": "6.25.0",
-        "babel-template": "6.25.0"
+        "babel-runtime": "^6.22.0",
+        "babel-template": "^6.24.1"
       }
     },
     "babel-messages": {
@@ -133,7 +155,7 @@
       "resolved": "https://registry.npmjs.org/babel-messages/-/babel-messages-6.23.0.tgz",
       "integrity": "sha1-8830cDhYA1sqKVHG7F7fbGLyYw4=",
       "requires": {
-        "babel-runtime": "6.25.0"
+        "babel-runtime": "^6.22.0"
       }
     },
     "babel-plugin-static-fs": {
@@ -141,9 +163,9 @@
       "resolved": "https://registry.npmjs.org/babel-plugin-static-fs/-/babel-plugin-static-fs-1.1.0.tgz",
       "integrity": "sha1-gSrtwGKX6QvquO0C8qaazcyiPAU=",
       "requires": {
-        "babel-template": "6.25.0",
-        "babel-types": "6.25.0",
-        "events": "1.1.1"
+        "babel-template": "^6.3.13",
+        "babel-types": "^6.4.1",
+        "events": "^1.1.0"
       }
     },
     "babel-register": {
@@ -151,13 +173,13 @@
       "resolved": "https://registry.npmjs.org/babel-register/-/babel-register-6.24.1.tgz",
       "integrity": "sha1-fhDhOi9xBlvfrVoXh7pFvKbe118=",
       "requires": {
-        "babel-core": "6.25.0",
-        "babel-runtime": "6.25.0",
-        "core-js": "2.5.0",
-        "home-or-tmp": "2.0.0",
-        "lodash": "4.17.4",
-        "mkdirp": "0.5.1",
-        "source-map-support": "0.4.15"
+        "babel-core": "^6.24.1",
+        "babel-runtime": "^6.22.0",
+        "core-js": "^2.4.0",
+        "home-or-tmp": "^2.0.0",
+        "lodash": "^4.2.0",
+        "mkdirp": "^0.5.1",
+        "source-map-support": "^0.4.2"
       }
     },
     "babel-runtime": {
@@ -165,8 +187,8 @@
       "resolved": "https://registry.npmjs.org/babel-runtime/-/babel-runtime-6.25.0.tgz",
       "integrity": "sha1-M7mOql1IK7AajRqmtDetKwGuxBw=",
       "requires": {
-        "core-js": "2.5.0",
-        "regenerator-runtime": "0.10.5"
+        "core-js": "^2.4.0",
+        "regenerator-runtime": "^0.10.0"
       }
     },
     "babel-template": {
@@ -174,11 +196,11 @@
       "resolved": "https://registry.npmjs.org/babel-template/-/babel-template-6.25.0.tgz",
       "integrity": "sha1-ZlJBFmt8KqTGGdceGSlpVSsQwHE=",
       "requires": {
-        "babel-runtime": "6.25.0",
-        "babel-traverse": "6.25.0",
-        "babel-types": "6.25.0",
-        "babylon": "6.17.4",
-        "lodash": "4.17.4"
+        "babel-runtime": "^6.22.0",
+        "babel-traverse": "^6.25.0",
+        "babel-types": "^6.25.0",
+        "babylon": "^6.17.2",
+        "lodash": "^4.2.0"
       }
     },
     "babel-traverse": {
@@ -186,15 +208,15 @@
       "resolved": "https://registry.npmjs.org/babel-traverse/-/babel-traverse-6.25.0.tgz",
       "integrity": "sha1-IldJfi/NGbie3BPEyROB+VEklvE=",
       "requires": {
-        "babel-code-frame": "6.22.0",
-        "babel-messages": "6.23.0",
-        "babel-runtime": "6.25.0",
-        "babel-types": "6.25.0",
-        "babylon": "6.17.4",
-        "debug": "2.6.8",
-        "globals": "9.18.0",
-        "invariant": "2.2.2",
-        "lodash": "4.17.4"
+        "babel-code-frame": "^6.22.0",
+        "babel-messages": "^6.23.0",
+        "babel-runtime": "^6.22.0",
+        "babel-types": "^6.25.0",
+        "babylon": "^6.17.2",
+        "debug": "^2.2.0",
+        "globals": "^9.0.0",
+        "invariant": "^2.2.0",
+        "lodash": "^4.2.0"
       }
     },
     "babel-types": {
@@ -202,10 +224,10 @@
       "resolved": "https://registry.npmjs.org/babel-types/-/babel-types-6.25.0.tgz",
       "integrity": "sha1-cK+ySNVmDl0Y+BHZHIMDtUE0oY4=",
       "requires": {
-        "babel-runtime": "6.25.0",
-        "esutils": "2.0.2",
-        "lodash": "4.17.4",
-        "to-fast-properties": "1.0.3"
+        "babel-runtime": "^6.22.0",
+        "esutils": "^2.0.2",
+        "lodash": "^4.2.0",
+        "to-fast-properties": "^1.0.1"
       },
       "dependencies": {
         "esutils": {
@@ -226,65 +248,58 @@
       "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c="
     },
     "base-x": {
-      "version": "3.0.4",
-      "resolved": "https://registry.npmjs.org/base-x/-/base-x-3.0.4.tgz",
-      "integrity": "sha512-UYOadoSIkEI/VrRGSG6qp93rp2WdokiAiNYDfGW5qURAY8GiAQkvMbwNNSDYiVJopqv4gCna7xqf4rrNGp+5AA==",
+      "version": "3.0.5",
+      "resolved": "https://registry.npmjs.org/base-x/-/base-x-3.0.5.tgz",
+      "integrity": "sha512-C3picSgzPSLE+jW3tcBzJoGwitOtazb5B+5YmAxZm2ybmTi9LNgAtDO/jjVEBZwHoXmDBZ9m/IELj3elJVRBcA==",
       "requires": {
-        "safe-buffer": "5.1.1"
+        "safe-buffer": "^5.0.1"
       }
     },
-    "big.js": {
-      "version": "5.0.3",
-      "resolved": "https://registry.npmjs.org/big.js/-/big.js-5.0.3.tgz",
-      "integrity": "sha512-av8LNZGBl4cg2r4ZhWqghJOxi2P8UCcWhdmrFgcHPMmUJ6jx1FbnyxjwL4URYzMK3QJg60qeMefQhv9G14oYKA=="
+    "bignumber.js": {
+      "version": "8.1.1",
+      "resolved": "https://registry.npmjs.org/bignumber.js/-/bignumber.js-8.1.1.tgz",
+      "integrity": "sha512-QD46ppGintwPGuL1KqmwhR0O+N2cZUg8JG/VzwI2e28sM9TqHjQB10lI4QAaMHVbLzwVLLAwEglpKPViWX+5NQ=="
     },
     "bindings": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.3.0.tgz",
-      "integrity": "sha512-DpLh5EzMR2kzvX1KIlVC0VkC3iZtHKTgdtZ0a3pglBZdaQFjt5S9g9xd1lE+YvXyfd6mtCeRnrUfOLYiTMlNSw=="
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.5.0.tgz",
+      "integrity": "sha512-p2q/t/mhvuOj/UeLlV6566GD/guowlr0hHxClI0W9m7MWYkL1F0hLo+0Aexs9HSPCtR1SXQ0TD3MMKrXZajbiQ==",
+      "requires": {
+        "file-uri-to-path": "1.0.0"
+      }
     },
     "bip66": {
       "version": "1.1.5",
       "resolved": "https://registry.npmjs.org/bip66/-/bip66-1.1.5.tgz",
       "integrity": "sha1-AfqHSHhcpwlV1QESF9GzE5lpyiI=",
       "requires": {
-        "safe-buffer": "5.1.1"
+        "safe-buffer": "^5.0.1"
       }
     },
     "bl": {
-      "version": "1.2.2",
-      "resolved": "https://registry.npmjs.org/bl/-/bl-1.2.2.tgz",
-      "integrity": "sha512-e8tQYnZodmebYDWGH7KMRvtzKXaJHx3BbilrgZCfvyLUYdKpK1t5PSPmpkny/SgiTSCnjfLW7v5rlONXVFkQEA==",
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/bl/-/bl-3.0.0.tgz",
+      "integrity": "sha512-EUAyP5UHU5hxF8BPT0LKW8gjYLhq1DQIcneOX/pL/m2Alo+OYDQAJlHq+yseMP50Os2nHXOSic6Ss3vSQeyf4A==",
       "requires": {
-        "readable-stream": "2.3.6",
-        "safe-buffer": "5.1.1"
+        "readable-stream": "^3.0.1"
       },
       "dependencies": {
-        "process-nextick-args": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.0.tgz",
-          "integrity": "sha512-MtEC1TqN0EU5nephaJ4rAtThHtC86dNN9qCuEhtshvpVBkAW5ZO7BASN9REnF9eoXGcRub+pFuKEpOHE+HbEMw=="
-        },
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+    "xhr2-cookies": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/xhr2-cookies/-/xhr2-cookies-1.1.0.tgz",
+      "integrity": "sha1-fXdEnQmZGX8VXLc7I99yUF7YnUg=",
+      "requires": {
+        "cookiejar": "^2.1.1"
+      }
+    },
     "xmlhttprequest": {
       "version": "1.8.0",
       "resolved": "https://registry.npmjs.org/xmlhttprequest/-/xmlhttprequest-1.8.0.tgz",
@@ -1809,9 +2066,9 @@
       "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68="
     },
     "yallist": {
-      "version": "2.1.2",
-      "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
-      "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI="
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.0.3.tgz",
+      "integrity": "sha512-S+Zk8DEWE6oKpV+vI3qWkaK+jSbIK86pCwe2IF/xwIpQ8jEuxpw9NyaGjmp9+BoJv5FV2piqCDcoCtStppiq2A=="
     }
   }
 }
diff --git a/package.json b/package.json
index 4771a73..bb284ec 100644
--- a/package.json
+++ b/package.json
@@ -10,13 +10,14 @@
     "create-wallet": "scripts/create-wallet.js"
   },
   "dependencies": {
-    "ethers": "^3.0.15",
+    "eth-provider": "^0.2.2",
+    "ethers": "^4.0.27",
     "group-array": "^0.3.3",
     "kosmos-schemas": "^1.1.2",
-    "node-cron": "^1.2.1",
-    "node-fetch": "^1.6.3",
-    "prompt": "^1.0.0",
-    "kredits-contracts": "3.x"
+    "kredits-contracts": "4.x",
+    "node-cron": "^2.0.3",
+    "node-fetch": "^2.3.0",
+    "prompt": "^1.0.0"
   },
   "repository": {
     "type": "git",