diff --git a/lib/cmds/blockchain/blockchain.js b/lib/cmds/blockchain/blockchain.js
index 6ca3105b..84a77c64 100644
--- a/lib/cmds/blockchain/blockchain.js
+++ b/lib/cmds/blockchain/blockchain.js
@@ -1,9 +1,9 @@
 const async = require('async');
 const child_process = require('child_process');
-const _ = require('underscore');
 
 const fs = require('../../core/fs.js');
 const constants = require('../../constants.json');
+const utils = require('../../utils/utils.js');
 
 const GethCommands = require('./geth_commands.js');
 const DevFunds = require('./dev_funds.js');
@@ -158,7 +158,7 @@ Blockchain.prototype.run = function() {
       console.error(err);
       return;
     }
-    args = _.compact(args);
+    args = utils.compact(args);
 
     let full_cmd = cmd + " " + args.join(' ');
     console.log(__("running: %s", full_cmd.underline).green);
diff --git a/lib/contracts/deploy_manager.js b/lib/contracts/deploy_manager.js
index 34abcde3..7290ad59 100644
--- a/lib/contracts/deploy_manager.js
+++ b/lib/contracts/deploy_manager.js
@@ -1,5 +1,6 @@
 let async = require('async');
-const _  = require('underscore');
+
+const utils = require('../utils/utils.js');
 
 class DeployManager {
   constructor(options) {
@@ -32,7 +33,7 @@ class DeployManager {
       self.logger.info(__("deploying contracts"));
       self.events.emit("deploy:beforeAll");
 
-      const contractsPerDependencyCount = _.groupBy(contracts, 'dependencyCount');
+      const contractsPerDependencyCount = utils.groupBy(contracts, 'dependencyCount');
       async.eachSeries(contractsPerDependencyCount,
         function (parallelGroups, callback) {
           async.each(parallelGroups, (contract, eachCb) => {
diff --git a/lib/core/plugin.js b/lib/core/plugin.js
index d622dbfd..80e14ec0 100644
--- a/lib/core/plugin.js
+++ b/lib/core/plugin.js
@@ -1,7 +1,6 @@
 const fs = require('./fs.js');
 const utils = require('../utils/utils.js');
 const constants = require('../constants');
-const _ = require('underscore');
 
 // TODO: pass other params like blockchainConfig, contract files, etc..
 var Plugin = function(options) {
@@ -149,7 +148,7 @@ Plugin.prototype.has = function(pluginType) {
 
 Plugin.prototype.addPluginType = function(pluginType) {
   this.pluginTypes.push(pluginType);
-  this.pluginTypes = _.uniq(this.pluginTypes);
+  this.pluginTypes = Array.from(new Set(this.pluginTypes));
 };
 
 Plugin.prototype.generateProvider = function(args) {
diff --git a/lib/modules/profiler/fuzzer.js b/lib/modules/profiler/fuzzer.js
index 8a07614d..6e11e8e1 100644
--- a/lib/modules/profiler/fuzzer.js
+++ b/lib/modules/profiler/fuzzer.js
@@ -1,5 +1,6 @@
 const utils = require('web3-utils');
-const _ = require('underscore');
+
+const u = require('../../utils/utils.js');
 
 // generates random inputs based on the inputs of an ABI
 class ContractFuzzer {
@@ -64,7 +65,7 @@ class ContractFuzzer {
   }
 
   generateRandomBool() {
-    return _.sample([true, false]);
+    return u.sample([true, false]);
   }
 
   generateArrayOfType(length, type) {
diff --git a/lib/modules/profiler/gasEstimator.js b/lib/modules/profiler/gasEstimator.js
index 41f76222..c755cf2c 100644
--- a/lib/modules/profiler/gasEstimator.js
+++ b/lib/modules/profiler/gasEstimator.js
@@ -1,6 +1,5 @@
 /*global web3*/
 const async = require('async');
-const _ = require('underscore');
 const ContractFuzzer = require('./fuzzer.js');
 
 class GasEstimator {
@@ -48,11 +47,11 @@ class GasEstimator {
               }, (err, variance) => {
                 if (err) {
                   return gasCb(err, name, abiMethod.type);
-                } else if (_.isEqual(variance[0], variance[1]) && _.isEqual(variance[1], variance[2])) {
+                } else if (variance.every(v => v === variance[0])) {
                   gasMap[name] = variance[0];
                 } else {
                   // get average
-                  let sum = _.reduce(variance, function(memo, num) { return memo + num; }, 0);
+                  let sum = variance.reduce(function(memo, num) { return memo + num; });
                   gasMap[name] = sum / variance.length;
                 }
                 return gasCb(null, name, abiMethod.type);
diff --git a/lib/pipeline/watch.js b/lib/pipeline/watch.js
index 6d028ddc..585ed778 100644
--- a/lib/pipeline/watch.js
+++ b/lib/pipeline/watch.js
@@ -1,6 +1,5 @@
 let chokidar = require('chokidar');
 let path = require('path');
-const _ = require('underscore');
 
 let fs = require('../core/fs.js');
 
@@ -67,7 +66,7 @@ class Watch {
 
       filesToWatch.push(fileGlob);
     }
-    filesToWatch = _.uniq(filesToWatch);
+    filesToWatch = Array.from(new Set(filesToWatch));
 
     this.watchFiles(
       filesToWatch,
diff --git a/lib/utils/utils.js b/lib/utils/utils.js
index 0f09c705..793b9e6f 100644
--- a/lib/utils/utils.js
+++ b/lib/utils/utils.js
@@ -359,6 +359,25 @@ function getHexBalanceFromString(balanceString, web3) {
   return web3.utils.toHex(web3.utils.toWei(match[1], match[2]));
 }
 
+function compact(array) {
+  return array.filter(n => n);
+}
+
+function groupBy(array, key) {
+  return array.reduce(function(rv, x) {
+    (rv[x[key]] = rv[x[key]] || []).push(x);
+    return rv;
+  }, {});
+}
+
+function sample(array) {
+  return array[Math.floor(Math.random() * array.length)];
+}
+
+function last(array) {
+  return array[array.length - 1];
+}
+
 module.exports = {
   joinPath,
   dirname,
@@ -390,5 +409,9 @@ module.exports = {
   buildUrl,
   buildUrlFromConfig,
   getWeiBalanceFromString,
-  getHexBalanceFromString
+  getHexBalanceFromString,
+  compact,
+  groupBy,
+  sample,
+  last
 };
diff --git a/lib/versions/npmTimer.js b/lib/versions/npmTimer.js
index 99a84a9c..d614c57c 100644
--- a/lib/versions/npmTimer.js
+++ b/lib/versions/npmTimer.js
@@ -1,6 +1,6 @@
 const {PerformanceObserver, performance} = require('perf_hooks');
-const _ = require('underscore');
 require('colors');
+const utils = require('../utils/utils.js');
 const i18n = require('../i18n/i18n.js');
 i18n.setOrDetectLocale('en');
 
@@ -33,7 +33,7 @@ class NpmTimer{
         let strDuration;
   
         // find any download ongoing measurements we've made
-        entry = _.last(_.where(items.getEntries(), {name: this._downloadOngoing}));
+        entry = utils.last(items.getEntries().filter(entry => entry.name === this._downloadOngoing));
         if(entry){
           // ongoing performance mark 
           strDuration = __('Downloading and installing {{packageName}} {{version}}... ({{duration}}ms elapsed)', {packageName: this._packageName, version: this._version, duration: entry.duration});
@@ -41,7 +41,7 @@ class NpmTimer{
         }
         else{
           // otherwise, find our download complete measurement
-          entry = _.last(_.where(items.getEntries(), {name: this._downloadComplete}));
+          entry = utils.last(items.getEntries().filter(entry => entry.name === this._downloadComplete));
           
           if(entry){
             strDuration = __('Finished downloading and installing {{packageName}} {{version}} in {{duration}}ms', {packageName: this._packageName, version: this._version, duration: entry.duration});
diff --git a/package-lock.json b/package-lock.json
index 3c40471b..8643af87 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -308,12 +308,6 @@
       "resolved": "https://registry.npmjs.org/array-differ/-/array-differ-1.0.0.tgz",
       "integrity": "sha1-7/UuN1gknTO+QCuLuOVkuytdQDE="
     },
-    "array-find-index": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/array-find-index/-/array-find-index-1.0.2.tgz",
-      "integrity": "sha1-3wEKoSh+Fku9pvlyOwqWoexBh6E=",
-      "dev": true
-    },
     "array-flatten": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
@@ -1771,24 +1765,6 @@
       "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-4.1.0.tgz",
       "integrity": "sha1-1UVjW+HjPFQmScaRc+Xeas+uNN0="
     },
-    "camelcase-keys": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/camelcase-keys/-/camelcase-keys-2.1.0.tgz",
-      "integrity": "sha1-MIvur/3ygRkFHvodkyITyRuPkuc=",
-      "dev": true,
-      "requires": {
-        "camelcase": "^2.0.0",
-        "map-obj": "^1.0.0"
-      },
-      "dependencies": {
-        "camelcase": {
-          "version": "2.1.1",
-          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-2.1.1.tgz",
-          "integrity": "sha1-fB0W1nmhu+WcoCys7PsBHiAfWh8=",
-          "dev": true
-        }
-      }
-    },
     "caniuse-api": {
       "version": "1.6.1",
       "resolved": "https://registry.npmjs.org/caniuse-api/-/caniuse-api-1.6.1.tgz",
@@ -2056,12 +2032,6 @@
       "resolved": "https://registry.npmjs.org/code-point-at/-/code-point-at-1.1.0.tgz",
       "integrity": "sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c="
     },
-    "coffeescript": {
-      "version": "1.10.0",
-      "resolved": "https://registry.npmjs.org/coffeescript/-/coffeescript-1.10.0.tgz",
-      "integrity": "sha1-56qDAZF+9iGzXYo580jc3R234z4=",
-      "dev": true
-    },
     "coinstring": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/coinstring/-/coinstring-2.3.0.tgz",
@@ -2401,15 +2371,6 @@
         "source-map": "^0.5.3"
       }
     },
-    "currently-unhandled": {
-      "version": "0.4.1",
-      "resolved": "https://registry.npmjs.org/currently-unhandled/-/currently-unhandled-0.4.1.tgz",
-      "integrity": "sha1-mI3zP+qxke95mmE2nddsF635V+o=",
-      "dev": true,
-      "requires": {
-        "array-find-index": "^1.0.1"
-      }
-    },
     "d": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/d/-/d-1.0.0.tgz",
@@ -3316,12 +3277,6 @@
       "resolved": "https://registry.npmjs.org/event-pubsub/-/event-pubsub-4.3.0.tgz",
       "integrity": "sha512-z7IyloorXvKbFx9Bpie2+vMJKKx1fH1EN5yiTfp8CiLOTptSYy1g8H4yDpGlEdshL1PBiFtBHepF2cNsqeEeFQ=="
     },
-    "eventemitter2": {
-      "version": "0.4.14",
-      "resolved": "https://registry.npmjs.org/eventemitter2/-/eventemitter2-0.4.14.tgz",
-      "integrity": "sha1-j2G3XN4BKy6esoTUVFWDtWQ7Yas=",
-      "dev": true
-    },
     "eventemitter3": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/eventemitter3/-/eventemitter3-3.1.0.tgz",
@@ -3367,12 +3322,6 @@
         }
       }
     },
-    "exit": {
-      "version": "0.1.2",
-      "resolved": "https://registry.npmjs.org/exit/-/exit-0.1.2.tgz",
-      "integrity": "sha1-BjJjj42HfMghB9MKD/8aF8uhzQw=",
-      "dev": true
-    },
     "exit-hook": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/exit-hook/-/exit-hook-1.1.1.tgz",
@@ -3829,30 +3778,6 @@
         "locate-path": "^2.0.0"
       }
     },
-    "findup-sync": {
-      "version": "0.3.0",
-      "resolved": "https://registry.npmjs.org/findup-sync/-/findup-sync-0.3.0.tgz",
-      "integrity": "sha1-N5MKpdgWt3fANEXhlmzGeQpMCxY=",
-      "dev": true,
-      "requires": {
-        "glob": "~5.0.0"
-      },
-      "dependencies": {
-        "glob": {
-          "version": "5.0.15",
-          "resolved": "https://registry.npmjs.org/glob/-/glob-5.0.15.tgz",
-          "integrity": "sha1-G8k2ueAvSmA/zCIuz3Yz0wuLk7E=",
-          "dev": true,
-          "requires": {
-            "inflight": "^1.0.4",
-            "inherits": "2",
-            "minimatch": "2 || 3",
-            "once": "^1.3.0",
-            "path-is-absolute": "^1.0.0"
-          }
-        }
-      }
-    },
     "first-chunk-stream": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/first-chunk-stream/-/first-chunk-stream-2.0.0.tgz",
@@ -4092,12 +4017,6 @@
       "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-1.0.2.tgz",
       "integrity": "sha1-9wLmMSfn4jHBYKgMFVSstw1QR+U="
     },
-    "get-stdin": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/get-stdin/-/get-stdin-4.0.1.tgz",
-      "integrity": "sha1-uWjGsKBDhDJJAui/Gl3zJXmkUP4=",
-      "dev": true
-    },
     "get-stream": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/get-stream/-/get-stream-3.0.0.tgz",
@@ -4108,12 +4027,6 @@
       "resolved": "https://registry.npmjs.org/get-value/-/get-value-2.0.6.tgz",
       "integrity": "sha1-3BXKHGcjh8p2vTesCjlbogQqLCg="
     },
-    "getobject": {
-      "version": "0.1.0",
-      "resolved": "https://registry.npmjs.org/getobject/-/getobject-0.1.0.tgz",
-      "integrity": "sha1-BHpEl4n6Fg0Bj1SG7ZEyC27HiFw=",
-      "dev": true
-    },
     "getpass": {
       "version": "0.1.7",
       "resolved": "https://registry.npmjs.org/getpass/-/getpass-0.1.7.tgz",
@@ -4395,249 +4308,6 @@
       "resolved": "https://registry.npmjs.org/growl/-/growl-1.10.5.tgz",
       "integrity": "sha512-qBr4OuELkhPenW6goKVXiv47US3clb3/IbuWF9KNKEijAy9oeHxU9IgzjvJhHkUzhaj7rOUD7+YGWqUjLp5oSA=="
     },
-    "grunt": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.0.3.tgz",
-      "integrity": "sha512-/JzmZNPfKorlCrrmxWqQO4JVodO+DVd5XX4DkocL/1WlLlKVLE9+SdEIempOAxDhWPysLle6afvn/hg7Ck2k9g==",
-      "dev": true,
-      "requires": {
-        "coffeescript": "~1.10.0",
-        "dateformat": "~1.0.12",
-        "eventemitter2": "~0.4.13",
-        "exit": "~0.1.1",
-        "findup-sync": "~0.3.0",
-        "glob": "~7.0.0",
-        "grunt-cli": "~1.2.0",
-        "grunt-known-options": "~1.1.0",
-        "grunt-legacy-log": "~2.0.0",
-        "grunt-legacy-util": "~1.1.1",
-        "iconv-lite": "~0.4.13",
-        "js-yaml": "~3.5.2",
-        "minimatch": "~3.0.2",
-        "mkdirp": "~0.5.1",
-        "nopt": "~3.0.6",
-        "path-is-absolute": "~1.0.0",
-        "rimraf": "~2.6.2"
-      },
-      "dependencies": {
-        "dateformat": {
-          "version": "1.0.12",
-          "resolved": "https://registry.npmjs.org/dateformat/-/dateformat-1.0.12.tgz",
-          "integrity": "sha1-nxJLZ1lMk3/3BpMuSmQsyo27/uk=",
-          "dev": true,
-          "requires": {
-            "get-stdin": "^4.0.1",
-            "meow": "^3.3.0"
-          }
-        },
-        "glob": {
-          "version": "7.0.6",
-          "resolved": "https://registry.npmjs.org/glob/-/glob-7.0.6.tgz",
-          "integrity": "sha1-IRuvr0nlJbjNkyYNFKsTYVKz9Xo=",
-          "dev": true,
-          "requires": {
-            "fs.realpath": "^1.0.0",
-            "inflight": "^1.0.4",
-            "inherits": "2",
-            "minimatch": "^3.0.2",
-            "once": "^1.3.0",
-            "path-is-absolute": "^1.0.0"
-          }
-        },
-        "js-yaml": {
-          "version": "3.5.5",
-          "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.5.5.tgz",
-          "integrity": "sha1-A3fDgBfKvHMisNH7zSWkkWQfL74=",
-          "dev": true,
-          "requires": {
-            "argparse": "^1.0.2",
-            "esprima": "^2.6.0"
-          }
-        },
-        "rimraf": {
-          "version": "2.6.2",
-          "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.6.2.tgz",
-          "integrity": "sha512-lreewLK/BlghmxtfH36YYVg1i8IAce4TI7oao75I1g245+6BctqTVQiBP3YUJ9C6DQOXJmkYR9X9fCLtCOJc5w==",
-          "dev": true,
-          "requires": {
-            "glob": "^7.0.5"
-          }
-        }
-      }
-    },
-    "grunt-cli": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/grunt-cli/-/grunt-cli-1.2.0.tgz",
-      "integrity": "sha1-VisRnrsGndtGSs4oRVAb6Xs1tqg=",
-      "dev": true,
-      "requires": {
-        "findup-sync": "~0.3.0",
-        "grunt-known-options": "~1.1.0",
-        "nopt": "~3.0.6",
-        "resolve": "~1.1.0"
-      },
-      "dependencies": {
-        "resolve": {
-          "version": "1.1.7",
-          "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.1.7.tgz",
-          "integrity": "sha1-IDEU2CrSxe2ejgQRs5ModeiJ6Xs=",
-          "dev": true
-        }
-      }
-    },
-    "grunt-contrib-clean": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/grunt-contrib-clean/-/grunt-contrib-clean-1.1.0.tgz",
-      "integrity": "sha1-Vkq/LQN4qYOhW54/MO51tzjEBjg=",
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-      "requires": {
-        "async": "^1.5.2",
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-          "dev": true
-        },
-        "rimraf": {
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-          "integrity": "sha512-lreewLK/BlghmxtfH36YYVg1i8IAce4TI7oao75I1g245+6BctqTVQiBP3YUJ9C6DQOXJmkYR9X9fCLtCOJc5w==",
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-          }
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-      }
-    },
-    "grunt-contrib-coffee": {
-      "version": "2.0.0",
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-      "integrity": "sha512-r5+jxEA3aiSkCuIz/6FjAi16c+DjpxX3CakkPGgswY/QRJ21/swsWIQKOz4rfk+/aUJ1gyqwYAkeRNSddmeXWA==",
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-        "coffeescript": "^2.0.1",
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-    "grunt-known-options": {
-      "version": "1.1.0",
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-    "grunt-legacy-log": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/grunt-legacy-log/-/grunt-legacy-log-2.0.0.tgz",
-      "integrity": "sha512-1m3+5QvDYfR1ltr8hjiaiNjddxGdQWcH0rw1iKKiQnF0+xtgTazirSTGu68RchPyh1OBng1bBUjLmX8q9NpoCw==",
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-          "integrity": "sha1-FopHAXVran9RoSzgyXv6KMCE7WM=",
-          "dev": true
-        }
-      }
-    },
-    "grunt-legacy-log-utils": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/grunt-legacy-log-utils/-/grunt-legacy-log-utils-2.0.1.tgz",
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-        "chalk": "~2.4.1",
-        "lodash": "~4.17.10"
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-        "ansi-styles": {
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diff --git a/package.json b/package.json
index c21c1484..420fd7ad 100644
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