diff --git a/docs/faq.md b/docs/faq.md
index 16b6ddf67..8e51c3df7 100644
--- a/docs/faq.md
+++ b/docs/faq.md
@@ -187,12 +187,13 @@ is complete before continuing.
 
 How do I switch off an option in the CLI?
 -----------------------------------------
-i.e. `webdriver-manager update --chrome=false` does not work. 
-This has to do with the way `optimist` parses command line args. In order to pass a false value, do one of the following:
+This has to do with the way `yargs` parses command line args. In order to pass a false value, do one of the following:
 
 1) `webdriver-manager update --chrome=0`
 
-2) `webdriver-manager update --no-chrome` (see https://github.com/substack/node-optimist#negate-fields)
+2) `webdriver-manager update --chrome=false`
+
+3) `webdriver-manager update --no-chrome` (see https://github.com/yargs/yargs/blob/HEAD/docs/tricks.md#negate)
 
 Why does Protractor fail when I decorate $timeout?
 --------------------------------------------------
diff --git a/lib/cli.ts b/lib/cli.ts
index a84888fa8..7b184af02 100644
--- a/lib/cli.ts
+++ b/lib/cli.ts
@@ -1,6 +1,6 @@
 import * as fs from 'fs';
-import * as optimist from 'optimist';
 import * as path from 'path';
+import * as yargs from 'yargs';
 
 /**
  * The command line interface for interacting with the Protractor runner.
@@ -115,7 +115,7 @@ let allowedNames = [
   'stackTrace'
 ];
 
-let optimistOptions: any = {
+let yargsOptions: any = {
   describes: {
     help: 'Print Protractor help menu',
     version: 'Print Protractor version',
@@ -153,30 +153,33 @@ let optimistOptions: any = {
   strings: {'capabilities.tunnel-identifier': ''}
 };
 
-optimist.usage(
+yargs.usage(
     'Usage: protractor [configFile] [options]\n' +
     'configFile defaults to protractor.conf.js\n' +
     'The [options] object will override values from the config file.\n' +
     'See the reference config for a full list of options.');
-for (let key of Object.keys(optimistOptions.describes)) {
-  optimist.describe(key, optimistOptions.describes[key]);
+for (let key of Object.keys(yargsOptions.describes)) {
+  yargs.describe(key, yargsOptions.describes[key]);
 }
-for (let key of Object.keys(optimistOptions.aliases)) {
-  optimist.alias(key, optimistOptions.aliases[key]);
+for (let key of Object.keys(yargsOptions.aliases)) {
+  yargs.alias(key, yargsOptions.aliases[key]);
 }
-for (let key of Object.keys(optimistOptions.strings)) {
-  optimist.string(key);
+for (let key of Object.keys(yargsOptions.strings)) {
+  yargs.string(key);
 }
-optimist.check(function(arg: any) {
+
+yargs.check(function(arg: any) {
   if (arg._.length > 1) {
     throw new Error('Error: more than one config file specified');
   }
+
+  return true;
 });
 
-let argv: any = optimist.parse(args);
+let argv: any = yargs.parse(args);
 
 if (argv.help) {
-  optimist.showHelp();
+  yargs.showHelp();
   process.exit(0);
 }
 
@@ -233,7 +236,7 @@ if (!configFile && !argv.elementExplorer && args.length < 3) {
   console.log(
       '**you must either specify a configuration file ' +
       'or at least 3 options. See below for the options:\n');
-  optimist.showHelp();
+  yargs.showHelp();
   process.exit(1);
 }
 
diff --git a/package-lock.json b/package-lock.json
index b14058260..e10c5411d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -22,9 +22,9 @@
       "integrity": "sha512-wc+VveszMLyMWFvXLkloixT4n0harUIVZjnpzztaZ0nKLuul7Z32iMt2fUFGAaZ4y1XWjFRMtCI5ewvyh4aIeg==",
       "dev": true,
       "requires": {
-        "@types/events": "*",
-        "@types/minimatch": "*",
-        "@types/node": "*"
+        "@types/events": "1.1.0",
+        "@types/minimatch": "2.0.29",
+        "@types/node": "6.0.96"
       }
     },
     "@types/jasmine": {
@@ -39,7 +39,7 @@
       "integrity": "sha512-hYDVmQZT5VA2kigd4H4bv7vl/OhlympwREUemqBdOqtrYTo5Ytm12a5W5/nGgGYdanGVxj0x/VhZ7J3hOg/YKg==",
       "dev": true,
       "requires": {
-        "@types/jasmine": "*"
+        "@types/jasmine": "2.8.5"
       }
     },
     "@types/minimatch": {
@@ -48,24 +48,12 @@
       "integrity": "sha1-UALhT3Xi1x5WQoHfBDHIwbSio2o=",
       "dev": true
     },
-    "@types/minimist": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/@types/minimist/-/minimist-1.2.0.tgz",
-      "integrity": "sha1-aaI6OtKcrwCX8G7aWbNh7i8GOfY=",
-      "dev": true
-    },
     "@types/node": {
       "version": "6.0.96",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-6.0.96.tgz",
       "integrity": "sha512-fsOOY6tMQ3jCB2wD51XFDmmpgm4wVKkJECdcVRqapbJEa7awJDcr+SaH8toz+4r4KW8YQ3M7ybXMoSDo1QGewA==",
       "dev": true
     },
-    "@types/optimist": {
-      "version": "0.0.29",
-      "resolved": "https://registry.npmjs.org/@types/optimist/-/optimist-0.0.29.tgz",
-      "integrity": "sha1-qIc1gLOoS2msHmhzI7Ffu+uQR5o=",
-      "dev": true
-    },
     "@types/q": {
       "version": "0.0.32",
       "resolved": "https://registry.npmjs.org/@types/q/-/q-0.0.32.tgz",
@@ -82,16 +70,21 @@
       "integrity": "sha1-hiRnWMfdbSGmR0/whKR0DsBesh8=",
       "dev": true,
       "requires": {
-        "mime-types": "~2.1.16",
+        "mime-types": "2.1.17",
         "negotiator": "0.6.1"
       }
     },
+    "adm-zip": {
+      "version": "0.4.14",
+      "resolved": "https://registry.npmjs.org/adm-zip/-/adm-zip-0.4.14.tgz",
+      "integrity": "sha512-/9aQCnQHF+0IiCl0qhXoK7qs//SwYE7zX8lsr/DNk1BRAHYxeLZPL4pguwK29gUEqasYQjqPtEpDRSWEkdHn9g=="
+    },
     "agent-base": {
       "version": "4.2.0",
       "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-4.2.0.tgz",
       "integrity": "sha512-c+R/U5X+2zz2+UCrCFv6odQzJdoqI+YecuhnAJLa1zYaMc13zPfwMwZrr91Pd1DYNo/yPRbiM4WVf9whgwFsIg==",
       "requires": {
-        "es6-promisify": "^5.0.0"
+        "es6-promisify": "5.0.0"
       }
     },
     "ajv": {
@@ -99,10 +92,10 @@
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-5.5.1.tgz",
       "integrity": "sha1-s4u4h22ehr7plJVqBOch6IskjrI=",
       "requires": {
-        "co": "^4.6.0",
-        "fast-deep-equal": "^1.0.0",
-        "fast-json-stable-stringify": "^2.0.0",
-        "json-schema-traverse": "^0.3.0"
+        "co": "4.6.0",
+        "fast-deep-equal": "1.0.0",
+        "fast-json-stable-stringify": "2.0.0",
+        "json-schema-traverse": "0.3.1"
       }
     },
     "ansi-align": {
@@ -111,7 +104,7 @@
       "integrity": "sha1-w2rsy6VjuJzrVW82kPCx2eNUf38=",
       "dev": true,
       "requires": {
-        "string-width": "^2.0.0"
+        "string-width": "2.1.1"
       }
     },
     "ansi-gray": {
@@ -151,7 +144,7 @@
       "integrity": "sha1-jzuCf5Vai9ZpaX5KQlasPOrjVs8=",
       "dev": true,
       "requires": {
-        "arr-flatten": "^1.0.1"
+        "arr-flatten": "1.1.0"
       }
     },
     "arr-flatten": {
@@ -189,7 +182,7 @@
       "resolved": "https://registry.npmjs.org/array-union/-/array-union-1.0.2.tgz",
       "integrity": "sha1-mjRBDk9OPaI96jdb5b5w8kd47Dk=",
       "requires": {
-        "array-uniq": "^1.0.1"
+        "array-uniq": "1.0.3"
       }
     },
     "array-uniq": {
@@ -251,9 +244,9 @@
       "integrity": "sha1-Y/1D99weO7fONZR9uP42mj9Yx0s=",
       "dev": true,
       "requires": {
-        "chalk": "^1.1.3",
-        "esutils": "^2.0.2",
-        "js-tokens": "^3.0.2"
+        "chalk": "1.1.3",
+        "esutils": "2.0.2",
+        "js-tokens": "3.0.2"
       }
     },
     "balanced-match": {
@@ -267,7 +260,7 @@
       "integrity": "sha1-Y7xdy2EzG5K8Bf1SiVPDNGKgb40=",
       "optional": true,
       "requires": {
-        "tweetnacl": "^0.14.3"
+        "tweetnacl": "0.14.5"
       }
     },
     "beeper": {
@@ -281,7 +274,7 @@
       "resolved": "https://registry.npmjs.org/blocking-proxy/-/blocking-proxy-1.0.1.tgz",
       "integrity": "sha512-KE8NFMZr3mN2E0HcvCgRtX7DjhiIQrwle+nSVJVC/yqFb9+xznHl2ZcoBp2L9qzkI4t4cBFJ1efXF8Dwi132RA==",
       "requires": {
-        "minimist": "^1.2.0"
+        "minimist": "1.2.5"
       }
     },
     "body-parser": {
@@ -291,15 +284,15 @@
       "dev": true,
       "requires": {
         "bytes": "2.4.0",
-        "content-type": "~1.0.2",
-        "debug": "~2.2.0",
-        "depd": "~1.1.0",
-        "http-errors": "~1.5.0",
+        "content-type": "1.0.4",
+        "debug": "2.2.0",
+        "depd": "1.1.1",
+        "http-errors": "1.5.1",
         "iconv-lite": "0.4.13",
-        "on-finished": "~2.3.0",
+        "on-finished": "2.3.0",
         "qs": "6.2.0",
-        "raw-body": "~2.1.7",
-        "type-is": "~1.6.13"
+        "raw-body": "2.1.7",
+        "type-is": "1.6.15"
       },
       "dependencies": {
         "debug": {
@@ -330,7 +323,7 @@
       "resolved": "https://registry.npmjs.org/boom/-/boom-4.3.1.tgz",
       "integrity": "sha1-T4owBctKfjiJ90kDD9JbluAdLjE=",
       "requires": {
-        "hoek": "4.x.x"
+        "hoek": "4.2.0"
       }
     },
     "boxen": {
@@ -339,13 +332,13 @@
       "integrity": "sha512-TNPjfTr432qx7yOjQyaXm3dSR0MH9vXp7eT1BFSl/C51g+EFnOR9hTg1IreahGBmDNCehscshe45f+C1TBZbLw==",
       "dev": true,
       "requires": {
-        "ansi-align": "^2.0.0",
-        "camelcase": "^4.0.0",
-        "chalk": "^2.0.1",
-        "cli-boxes": "^1.0.0",
-        "string-width": "^2.0.0",
-        "term-size": "^1.2.0",
-        "widest-line": "^2.0.0"
+        "ansi-align": "2.0.0",
+        "camelcase": "4.1.0",
+        "chalk": "2.3.0",
+        "cli-boxes": "1.0.0",
+        "string-width": "2.1.1",
+        "term-size": "1.2.0",
+        "widest-line": "2.0.0"
       },
       "dependencies": {
         "ansi-styles": {
@@ -354,7 +347,7 @@
           "integrity": "sha512-NnSOmMEYtVR2JVMIGTzynRkkaxtiq1xnFBcdQD/DnNCYPoEPsVJhM98BDyaoNOQIi7p4okdi3E27eN7GQbsUug==",
           "dev": true,
           "requires": {
-            "color-convert": "^1.9.0"
+            "color-convert": "1.9.1"
           }
         },
         "chalk": {
@@ -363,9 +356,9 @@
           "integrity": "sha512-Az5zJR2CBujap2rqXGaJKaPHyJ0IrUimvYNX+ncCy8PJP4ltOGTrHUIo097ZaL2zMeKYpiCdqDvS6zdrTFok3Q==",
           "dev": true,
           "requires": {
-            "ansi-styles": "^3.1.0",
-            "escape-string-regexp": "^1.0.5",
-            "supports-color": "^4.0.0"
+            "ansi-styles": "3.2.0",
+            "escape-string-regexp": "1.0.5",
+            "supports-color": "4.5.0"
           }
         },
         "supports-color": {
@@ -374,7 +367,7 @@
           "integrity": "sha1-vnoN5ITexcXN34s9WRJQRJEvY1s=",
           "dev": true,
           "requires": {
-            "has-flag": "^2.0.0"
+            "has-flag": "2.0.0"
           }
         }
       }
@@ -384,7 +377,7 @@
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.8.tgz",
       "integrity": "sha1-wHshHHyVLsH479Uad+8NHTmQopI=",
       "requires": {
-        "balanced-match": "^1.0.0",
+        "balanced-match": "1.0.0",
         "concat-map": "0.0.1"
       }
     },
@@ -394,9 +387,9 @@
       "integrity": "sha1-uneWLhLf+WnWt2cR6RS3N4V79qc=",
       "dev": true,
       "requires": {
-        "expand-range": "^1.8.1",
-        "preserve": "^0.2.0",
-        "repeat-element": "^1.1.2"
+        "expand-range": "1.8.2",
+        "preserve": "0.2.0",
+        "repeat-element": "1.1.2"
       }
     },
     "browserstack": {
@@ -404,7 +397,7 @@
       "resolved": "https://registry.npmjs.org/browserstack/-/browserstack-1.5.1.tgz",
       "integrity": "sha512-O8VMT64P9NOLhuIoD4YngyxBURefaSdR4QdhG8l6HZ9VxtU7jc3m6jLufFwKA5gaf7fetfB2TnRJnMxyob+heg==",
       "requires": {
-        "https-proxy-agent": "^2.2.1"
+        "https-proxy-agent": "2.2.1"
       }
     },
     "bytes": {
@@ -436,9 +429,9 @@
       "integrity": "sha1-TQJjewZ/6Vi9v906QOxW/vc3Mkc=",
       "dev": true,
       "requires": {
-        "assertion-error": "^1.0.1",
-        "deep-eql": "^0.1.3",
-        "type-detect": "^1.0.0"
+        "assertion-error": "1.0.2",
+        "deep-eql": "0.1.3",
+        "type-detect": "1.0.0"
       }
     },
     "chai-as-promised": {
@@ -452,11 +445,11 @@
       "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
       "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
       "requires": {
-        "ansi-styles": "^2.2.1",
-        "escape-string-regexp": "^1.0.2",
-        "has-ansi": "^2.0.0",
-        "strip-ansi": "^3.0.0",
-        "supports-color": "^2.0.0"
+        "ansi-styles": "2.2.1",
+        "escape-string-regexp": "1.0.5",
+        "has-ansi": "2.0.0",
+        "strip-ansi": "3.0.1",
+        "supports-color": "2.0.0"
       }
     },
     "clang-format": {
@@ -465,9 +458,9 @@
       "integrity": "sha1-v1L0InfUHtNhhZH4cUWs9krOt+Y=",
       "dev": true,
       "requires": {
-        "async": "^1.5.2",
-        "glob": "^7.0.0",
-        "resolve": "^1.1.6"
+        "async": "1.5.2",
+        "glob": "7.1.2",
+        "resolve": "1.5.0"
       }
     },
     "cli": {
@@ -477,7 +470,7 @@
       "dev": true,
       "requires": {
         "exit": "0.1.2",
-        "glob": "^7.1.1"
+        "glob": "7.1.2"
       }
     },
     "cli-boxes": {
@@ -492,12 +485,37 @@
       "integrity": "sha1-OlrnT9drYmevZm5p4q+70B3vNNE=",
       "dev": true,
       "requires": {
-        "ansi-regex": "^2.1.1",
-        "d": "1",
-        "es5-ext": "^0.10.12",
-        "es6-iterator": "2",
-        "memoizee": "^0.4.3",
-        "timers-ext": "0.1"
+        "ansi-regex": "2.1.1",
+        "d": "1.0.0",
+        "es5-ext": "0.10.38",
+        "es6-iterator": "2.0.3",
+        "memoizee": "0.4.11",
+        "timers-ext": "0.1.2"
+      }
+    },
+    "cliui": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/cliui/-/cliui-4.1.0.tgz",
+      "integrity": "sha512-4FG+RSG9DL7uEwRUZXZn3SS34DiDPfzP0VOiEwtUWlE+AR2EIg+hSyvrIgUUfhdgR/UkAeW2QHgeP+hWrXs7jQ==",
+      "requires": {
+        "string-width": "2.1.1",
+        "strip-ansi": "4.0.0",
+        "wrap-ansi": "2.1.0"
+      },
+      "dependencies": {
+        "ansi-regex": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
+          "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg="
+        },
+        "strip-ansi": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
+          "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
+          "requires": {
+            "ansi-regex": "3.0.0"
+          }
+        }
       }
     },
     "clone": {
@@ -517,13 +535,18 @@
       "resolved": "https://registry.npmjs.org/co/-/co-4.6.0.tgz",
       "integrity": "sha1-bqa989hTrlTMuOR7+gvz+QMfsYQ="
     },
+    "code-point-at": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/code-point-at/-/code-point-at-1.1.0.tgz",
+      "integrity": "sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c="
+    },
     "color-convert": {
       "version": "1.9.1",
       "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.1.tgz",
       "integrity": "sha512-mjGanIiwQJskCC18rPR6OmrZ6fm2Lc7PeGFYwCmy5J34wC6F1PzdGL6xeMfmgicfYcNLGuVFA3WzXtIDCQSZxQ==",
       "dev": true,
       "requires": {
-        "color-name": "^1.1.1"
+        "color-name": "1.1.3"
       }
     },
     "color-name": {
@@ -543,7 +566,7 @@
       "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.5.tgz",
       "integrity": "sha1-k4NwpXtKUd6ix3wV1cX9+JUWQAk=",
       "requires": {
-        "delayed-stream": "~1.0.0"
+        "delayed-stream": "1.0.0"
       }
     },
     "commander": {
@@ -563,12 +586,12 @@
       "integrity": "sha512-5oNkD/L++l0O6xGXxb1EWS7SivtjfGQlRyxJsYgE0Z495/L81e2h4/d3r969hoPXuFItzNOKMtsXgYG4c7dYvw==",
       "dev": true,
       "requires": {
-        "dot-prop": "^4.1.0",
-        "graceful-fs": "^4.1.2",
-        "make-dir": "^1.0.0",
-        "unique-string": "^1.0.0",
-        "write-file-atomic": "^2.0.0",
-        "xdg-basedir": "^3.0.0"
+        "dot-prop": "4.2.0",
+        "graceful-fs": "4.1.11",
+        "make-dir": "1.1.0",
+        "unique-string": "1.0.0",
+        "write-file-atomic": "2.3.0",
+        "xdg-basedir": "3.0.0"
       },
       "dependencies": {
         "graceful-fs": {
@@ -585,7 +608,7 @@
       "integrity": "sha1-8CQcRXMKn8YyOyBtvzjtx0HQuxA=",
       "dev": true,
       "requires": {
-        "date-now": "^0.1.4"
+        "date-now": "0.1.4"
       }
     },
     "content-disposition": {
@@ -628,7 +651,7 @@
       "integrity": "sha1-Br56vvlHo/FKMP1hBnHUAbyot7Y=",
       "dev": true,
       "requires": {
-        "capture-stack-trace": "^1.0.0"
+        "capture-stack-trace": "1.0.0"
       }
     },
     "cross-spawn": {
@@ -637,9 +660,9 @@
       "integrity": "sha1-6L0O/uWPz/b4+UUQoKVUu/ojVEk=",
       "dev": true,
       "requires": {
-        "lru-cache": "^4.0.1",
-        "shebang-command": "^1.2.0",
-        "which": "^1.2.9"
+        "lru-cache": "4.1.1",
+        "shebang-command": "1.2.0",
+        "which": "1.3.0"
       },
       "dependencies": {
         "lru-cache": {
@@ -648,8 +671,8 @@
           "integrity": "sha512-q4spe4KTfsAS1SUHLO0wz8Qiyf1+vMIAgpRYioFYDMNqKfHQbg+AVDH3i4fvpl71/P1L0dBl+fQi+P37UYf0ew==",
           "dev": true,
           "requires": {
-            "pseudomap": "^1.0.2",
-            "yallist": "^2.1.2"
+            "pseudomap": "1.0.2",
+            "yallist": "2.1.2"
           }
         }
       }
@@ -659,7 +682,7 @@
       "resolved": "https://registry.npmjs.org/cryptiles/-/cryptiles-3.1.2.tgz",
       "integrity": "sha1-qJ+7Ig9c4l7FboxKqKT9e1sNKf4=",
       "requires": {
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     "vinyl": {
@@ -4033,8 +4200,8 @@
       "integrity": "sha1-sEVbOPxeDPMNQyUTLkYZcMIJHN4=",
       "dev": true,
       "requires": {
-        "clone": "^1.0.0",
-        "clone-stats": "^0.0.1",
+        "clone": "1.0.3",
+        "clone-stats": "0.0.1",
         "replace-ext": "0.0.1"
       }
     },
@@ -4044,14 +4211,14 @@
       "integrity": "sha1-mmhRzhysHBzqX+hsCTHWIMLPqeY=",
       "dev": true,
       "requires": {
-        "defaults": "^1.0.0",
-        "glob-stream": "^3.1.5",
-        "glob-watcher": "^0.0.6",
-        "graceful-fs": "^3.0.0",
-        "mkdirp": "^0.5.0",
-        "strip-bom": "^1.0.0",
-        "through2": "^0.6.1",
-        "vinyl": "^0.4.0"
+        "defaults": "1.0.3",
+        "glob-stream": "3.1.18",
+        "glob-watcher": "0.0.6",
+        "graceful-fs": "3.0.11",
+        "mkdirp": "0.5.1",
+        "strip-bom": "1.0.0",
+        "through2": "0.6.5",
+        "vinyl": "0.4.6"
       },
       "dependencies": {
         "clone": {
@@ -4060,22 +4227,57 @@
           "integrity": "sha1-xhJqkK1Pctv1rNskPMN3JP6T/B8=",
           "dev": true
         },
+        "glob": {
+          "version": "4.5.3",
+          "resolved": "https://registry.npmjs.org/glob/-/glob-4.5.3.tgz",
+          "integrity": "sha1-xstz0yJsHv7wTePFbQEvAzd+4V8=",
+          "dev": true,
+          "requires": {
+            "inflight": "1.0.6",
+            "inherits": "2.0.3",
+            "minimatch": "2.0.10",
+            "once": "1.4.0"
+          }
+        },
+        "glob-stream": {
+          "version": "3.1.18",
+          "resolved": "https://registry.npmjs.org/glob-stream/-/glob-stream-3.1.18.tgz",
+          "integrity": "sha1-kXCl8St5Awb9/lmPMT+PeVT9FDs=",
+          "dev": true,
+          "requires": {
+            "glob": "4.5.3",
+            "glob2base": "0.0.12",
+            "minimatch": "2.0.10",
+            "ordered-read-streams": "0.1.0",
+            "through2": "0.6.5",
+            "unique-stream": "1.0.0"
+          }
+        },
         "isarray": {
           "version": "0.0.1",
           "resolved": "https://registry.npmjs.org/isarray/-/isarray-0.0.1.tgz",
           "integrity": "sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8=",
           "dev": true
         },
+        "minimatch": {
+          "version": "2.0.10",
+          "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-2.0.10.tgz",
+          "integrity": "sha1-jQh8OcazjAAbl/ynzm0OHoCvusc=",
+          "dev": true,
+          "requires": {
+            "brace-expansion": "1.1.8"
+          }
+        },
         "readable-stream": {
           "version": "1.0.34",
           "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-1.0.34.tgz",
           "integrity": "sha1-Elgg40vIQtLyqq+v5MKRbuMsFXw=",
           "dev": true,
           "requires": {
-            "core-util-is": "~1.0.0",
-            "inherits": "~2.0.1",
+            "core-util-is": "1.0.2",
+            "inherits": "2.0.3",
             "isarray": "0.0.1",
-            "string_decoder": "~0.10.x"
+            "string_decoder": "0.10.31"
           }
         },
         "through2": {
@@ -4084,8 +4286,8 @@
           "integrity": "sha1-QaucZ7KdVyCQcUEOHXp6lozTrUg=",
           "dev": true,
           "requires": {
-            "readable-stream": ">=1.0.33-1 <1.1.0-0",
-            "xtend": ">=4.0.0 <4.1.0-0"
+            "readable-stream": "1.0.34",
+            "xtend": "4.0.1"
           }
         },
         "vinyl": {
@@ -4094,8 +4296,8 @@
           "integrity": "sha1-LzVsh6VQolVGHza76ypbqL94SEc=",
           "dev": true,
           "requires": {
-            "clone": "^0.2.0",
-            "clone-stats": "^0.0.1"
+            "clone": "0.2.0",
+            "clone-stats": "0.0.1"
           }
         }
       }
@@ -4106,7 +4308,7 @@
       "integrity": "sha1-88+AJuHTqbY9Jj3VkSSNyW3D7Bw=",
       "dev": true,
       "requires": {
-        "tslint": "^4.1.1"
+        "tslint": "4.5.1"
       }
     },
     "webdriver-js-extender": {
@@ -4114,8 +4316,8 @@
       "resolved": "https://registry.npmjs.org/webdriver-js-extender/-/webdriver-js-extender-2.1.0.tgz",
       "integrity": "sha512-lcUKrjbBfCK6MNsh7xaY2UAUmZwe+/ib03AjVOpFobX4O7+83BUveSrLfU0Qsyb1DaKJdQRbuU+kM9aZ6QUhiQ==",
       "requires": {
-        "@types/selenium-webdriver": "^3.0.0",
-        "selenium-webdriver": "^3.0.1"
+        "@types/selenium-webdriver": "3.0.10",
+        "selenium-webdriver": "3.6.0"
       }
     },
     "webdriver-manager": {
@@ -4123,30 +4325,41 @@
       "resolved": "https://registry.npmjs.org/webdriver-manager/-/webdriver-manager-12.0.6.tgz",
       "integrity": "sha1-PfGkgZdwELTL+MnYXHpXeCjA5ws=",
       "requires": {
-        "adm-zip": "^0.4.7",
-        "chalk": "^1.1.1",
-        "del": "^2.2.0",
-        "glob": "^7.0.3",
-        "ini": "^1.3.4",
-        "minimist": "^1.2.0",
-        "q": "^1.4.1",
-        "request": "^2.78.0",
-        "rimraf": "^2.5.2",
-        "semver": "^5.3.0",
-        "xml2js": "^0.4.17"
+        "adm-zip": "0.4.14",
+        "chalk": "1.1.3",
+        "del": "2.2.2",
+        "glob": "7.1.2",
+        "ini": "1.3.5",
+        "minimist": "1.2.5",
+        "q": "1.4.1",
+        "request": "2.83.0",
+        "rimraf": "2.5.4",
+        "semver": "5.6.0",
+        "xml2js": "0.4.19"
       },
       "dependencies": {
-        "adm-zip": {
-          "version": "0.4.7",
-          "resolved": "https://registry.npmjs.org/adm-zip/-/adm-zip-0.4.7.tgz",
-          "integrity": "sha1-hgbCy/HEJs6MjsABdER/1Jtur8E="
+        "semver": {
+          "version": "5.6.0",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.6.0.tgz",
+          "integrity": "sha512-RS9R6R35NYgQn++fkDWaOmqGoj4Ek9gGs+DPxNUZKuwE183xjJroKvyo1IzVFeXvUrvmALy6FWD5xrdJT25gMg=="
         },
-        "rimraf": {
-          "version": "2.6.2",
-          "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.6.2.tgz",
-          "integrity": "sha512-lreewLK/BlghmxtfH36YYVg1i8IAce4TI7oao75I1g245+6BctqTVQiBP3YUJ9C6DQOXJmkYR9X9fCLtCOJc5w==",
+        "yargs": {
+          "version": "12.0.5",
+          "resolved": "https://registry.npmjs.org/yargs/-/yargs-12.0.5.tgz",
+          "integrity": "sha512-Lhz8TLaYnxq/2ObqHDql8dX8CJi97oHxrjUcYtzKbbykPtVW9WB+poxI+NM2UIzsMgNCZTIf0AQwsjK5yMAqZw==",
           "requires": {
-            "glob": "^7.0.5"
+            "cliui": "4.1.0",
+            "decamelize": "1.2.0",
+            "find-up": "3.0.0",
+            "get-caller-file": "1.0.3",
+            "os-locale": "3.1.0",
+            "require-directory": "2.1.1",
+            "require-main-filename": "1.0.1",
+            "set-blocking": "2.0.0",
+            "string-width": "2.1.1",
+            "which-module": "2.0.0",
+            "y18n": "4.0.0",
+            "yargs-parser": "11.1.1"
           }
         }
       }
@@ -4155,24 +4368,58 @@
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/which/-/which-1.3.0.tgz",
       "integrity": "sha512-xcJpopdamTuY5duC/KnTTNBraPK54YwpenP4lzxU8H91GudWpFv38u0CKjclE1Wi2EH2EDz5LRcHcKbCIzqGyg==",
-      "dev": true,
       "requires": {
-        "isexe": "^2.0.0"
+        "isexe": "2.0.0"
       }
     },
+    "which-module": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
+      "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho="
+    },
     "widest-line": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/widest-line/-/widest-line-2.0.0.tgz",
       "integrity": "sha1-AUKk6KJD+IgsAjOqDgKBqnYVInM=",
       "dev": true,
       "requires": {
-        "string-width": "^2.1.1"
+        "string-width": "2.1.1"
       }
     },
     "wordwrap": {
       "version": "0.0.3",
       "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.3.tgz",
-      "integrity": "sha1-o9XabNXAvAAI03I0u68b7WMFkQc="
+      "integrity": "sha1-o9XabNXAvAAI03I0u68b7WMFkQc=",
+      "dev": true
+    },
+    "wrap-ansi": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
+      "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
+      "requires": {
+        "string-width": "1.0.2",
+        "strip-ansi": "3.0.1"
+      },
+      "dependencies": {
+        "is-fullwidth-code-point": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-1.0.0.tgz",
+          "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
+          "requires": {
+            "number-is-nan": "1.0.1"
+          }
+        },
+        "string-width": {
+          "version": "1.0.2",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
+          "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
+          "requires": {
+            "code-point-at": "1.1.0",
+            "is-fullwidth-code-point": "1.0.0",
+            "strip-ansi": "3.0.1"
+          }
+        }
+      }
     },
     "wrappy": {
       "version": "1.0.2",
@@ -4185,9 +4432,9 @@
       "integrity": "sha512-xuPeK4OdjWqtfi59ylvVL0Yn35SF3zgcAcv7rBPFHVaEapaDr4GdGgm3j7ckTwH9wHL7fGmgfAnb0+THrHb8tA==",
       "dev": true,
       "requires": {
-        "graceful-fs": "^4.1.11",
-        "imurmurhash": "^0.1.4",
-        "signal-exit": "^3.0.2"
+        "graceful-fs": "4.1.11",
+        "imurmurhash": "0.1.4",
+        "signal-exit": "3.0.2"
       },
       "dependencies": {
         "graceful-fs": {
@@ -4209,8 +4456,8 @@
       "resolved": "https://registry.npmjs.org/xml2js/-/xml2js-0.4.19.tgz",
       "integrity": "sha512-esZnJZJOiJR9wWKMyuvSE1y6Dq5LCuJanqhxslH2bxM6duahNZ+HMpCLhBQGZkbX6xRf8x1Y2eJlgt2q3qo49Q==",
       "requires": {
-        "sax": ">=0.6.0",
-        "xmlbuilder": "~9.0.1"
+        "sax": "1.2.4",
+        "xmlbuilder": "9.0.4"
       }
     },
     "xmlbuilder": {
@@ -4224,11 +4471,51 @@
       "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68=",
       "dev": true
     },
+    "y18n": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
+      "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w=="
+    },
     "yallist": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
       "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
       "dev": true
+    },
+    "yargs": {
+      "version": "12.0.5",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-12.0.5.tgz",
+      "integrity": "sha512-Lhz8TLaYnxq/2ObqHDql8dX8CJi97oHxrjUcYtzKbbykPtVW9WB+poxI+NM2UIzsMgNCZTIf0AQwsjK5yMAqZw==",
+      "requires": {
+        "cliui": "4.1.0",
+        "decamelize": "1.2.0",
+        "find-up": "3.0.0",
+        "get-caller-file": "1.0.3",
+        "os-locale": "3.1.0",
+        "require-directory": "2.1.1",
+        "require-main-filename": "1.0.1",
+        "set-blocking": "2.0.0",
+        "string-width": "2.1.1",
+        "which-module": "2.0.0",
+        "y18n": "4.0.0",
+        "yargs-parser": "11.1.1"
+      }
+    },
+    "yargs-parser": {
+      "version": "11.1.1",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-11.1.1.tgz",
+      "integrity": "sha512-C6kB/WJDiaxONLJQnF8ccx9SEeoTTLek8RVbaOIsrAUS8VrBEXfmeSnCZxygc+XC2sNMBIwOOnfcxiynjHsVSQ==",
+      "requires": {
+        "camelcase": "5.3.1",
+        "decamelize": "1.2.0"
+      },
+      "dependencies": {
+        "camelcase": {
+          "version": "5.3.1",
+          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.3.1.tgz",
+          "integrity": "sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg=="
+        }
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index 344038a13..29281511b 100644
--- a/package.json
+++ b/package.json
@@ -20,13 +20,13 @@
     "glob": "^7.0.3",
     "jasmine": "2.8.0",
     "jasminewd2": "^2.1.0",
-    "optimist": "~0.6.0",
     "q": "1.4.1",
     "saucelabs": "^1.5.0",
     "selenium-webdriver": "3.6.0",
     "source-map-support": "~0.4.0",
     "webdriver-js-extender": "2.1.0",
-    "webdriver-manager": "^12.0.6"
+    "webdriver-manager": "^12.0.6",
+    "yargs": "^12.0.5"
   },
   "devDependencies": {
     "@types/chalk": "^0.4.28",
@@ -34,9 +34,7 @@
     "@types/jasmine": "^2.5.47",
     "@types/jasminewd2": "^2.0.0",
     "@types/minimatch": "^2.0.28",
-    "@types/minimist": "^1.1.28",
     "@types/node": "^6.0.46",
-    "@types/optimist": "^0.0.29",
     "body-parser": "~1.15.2",
     "chai": "~3.5.0",
     "chai-as-promised": "~5.3.0",
diff --git a/testapp/scripts/web-server.js b/testapp/scripts/web-server.js
index 7ded03d89..dc42220e3 100755
--- a/testapp/scripts/web-server.js
+++ b/testapp/scripts/web-server.js
@@ -2,7 +2,7 @@
 
 var express = require('express');
 var bodyParser = require('body-parser')
-var optimist = require('optimist');
+var yargs = require('yargs');
 var util = require('util');
 var path = require('path');
 var env = require('../../spec/environment.js');
@@ -12,7 +12,7 @@ var DEFAULT_PORT = process.env.HTTP_PORT || env.webServerDefaultPort;
 var testAppDir = path.resolve(__dirname, '..');
 var defaultAngular = require(path.resolve(testAppDir, 'ng1/lib/angular_version.js'));
 
-var argv = optimist.describe('port', 'port').
+var argv = yargs.describe('port', 'port').
     default('port', DEFAULT_PORT).
     describe('ngversion', 'version of AngularJS to use').
     default('ngversion', defaultAngular).