diff --git a/package.json b/package.json
index f240e9d8b7..3ee50a786a 100644
--- a/package.json
+++ b/package.json
@@ -151,7 +151,7 @@
   "homepage": "https://github.com/mozillla/addons-frontend#readme",
   "dependencies": {
     "babel-polyfill": "6.26.0",
-    "base62": "2.0.0",
+    "base62": "1.2.8",
     "base64url": "2.0.0",
     "better-npm-run": "0.1.0",
     "bunyan": "1.8.12",
@@ -284,7 +284,6 @@
     "svg-url-loader": "^2.0.2",
     "tmp": "^0.0.33",
     "tosource": "^1.0.0",
-    "uglifyjs-webpack-plugin": "^1.2.5",
     "webpack": "^3.1.0",
     "webpack-dev-middleware": "^1.10.2",
     "webpack-dev-server": "^3.1.1",
diff --git a/src/amo/components/App/index.js b/src/amo/components/App/index.js
index f4398877f6..df82bb847c 100644
--- a/src/amo/components/App/index.js
+++ b/src/amo/components/App/index.js
@@ -137,8 +137,8 @@ export class AppBase extends React.Component<Props> {
         `Auth token "${encodedTimestamp}" triggered this base62 error: "${base62Error}"`);
       return;
     }
-    // If the encoded timestamp was malformed it will be 0 or negative or NaN
-    if (createdAt <= 0 || Number.isNaN(createdAt)) {
+    // If the encoded timestamp was malformed it will be 0 or negative.
+    if (createdAt <= 0) {
       log.error(oneLine`Got an invalid timestamp from auth token;
         encoded value: ${encodedTimestamp}; decoded value: ${createdAt}`);
       return;
diff --git a/src/amo/utils.js b/src/amo/utils.js
index 71cb540e5d..37aec27b8d 100644
--- a/src/amo/utils.js
+++ b/src/amo/utils.js
@@ -1,5 +1,5 @@
 /* eslint camelcase: 0 */
-import base62Custom from 'base62/lib/custom';
+import base62 from 'base62';
 
 import NotAuthorized from 'amo/components/ErrorPage/NotAuthorized';
 import NotFound from 'amo/components/ErrorPage/NotFound';
@@ -28,16 +28,9 @@ export function getErrorComponent(status) {
  */
 export function getDjangoBase62() {
   // This is the alphabet used by Django.
-  const charset = base62Custom.indexCharset(
+  base62.setCharacterSet(
     '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz');
-  return {
-    encode: (int) => {
-      return base62Custom.encode(int, charset);
-    },
-    decode: (str) => {
-      return base62Custom.decode(str, charset);
-    },
-  };
+  return base62;
 }
 
 export const makeQueryStringWithUTM = ({
diff --git a/tests/unit/amo/test_utils.js b/tests/unit/amo/test_utils.js
index 6d93923b45..39e73679cb 100644
--- a/tests/unit/amo/test_utils.js
+++ b/tests/unit/amo/test_utils.js
@@ -1,7 +1,7 @@
 import NotAuthorized from 'amo/components/ErrorPage/NotAuthorized';
 import NotFound from 'amo/components/ErrorPage/NotFound';
 import ServerError from 'amo/components/ErrorPage/ServerError';
-import { getDjangoBase62, getErrorComponent } from 'amo/utils';
+import { getErrorComponent } from 'amo/utils';
 
 
 describe('amo/utils', () => {
@@ -22,30 +22,4 @@ describe('amo/utils', () => {
       expect(getErrorComponent(501)).toEqual(ServerError);
     });
   });
-
-  describe('getDjangoBase62', () => {
-    const base62 = getDjangoBase62();
-    const exampleBase62 = '9QVvGFw';
-    const exampleTimeStamp = 535493287492;
-
-    it('encodes a example number', () => {
-      expect(base62.encode(exampleTimeStamp)).toEqual(exampleBase62);
-    });
-
-    it('decodes a example encoded number', () => {
-      expect(base62.decode(exampleBase62)).toEqual(exampleTimeStamp);
-    });
-
-    it('returns NaN when decoding bogus input', () => {
-      expect(Number.isNaN(base62.decode('dfhhsk%%$#^@#$@'))).toBe(true);
-    });
-
-    it('returns 0 when decoding empty string', () => {
-      expect(base62.decode('')).toBe(0);
-    });
-
-    it('returns "" when encoding bogus input', () => {
-      expect(base62.encode('a-string')).toEqual('');
-    });
-  });
 });
diff --git a/webpack.prod.config.babel.js b/webpack.prod.config.babel.js
index cbb7f90122..6cef8c5470 100644
--- a/webpack.prod.config.babel.js
+++ b/webpack.prod.config.babel.js
@@ -4,7 +4,7 @@ import path from 'path';
 import config from 'config';
 import ExtractTextPlugin from 'extract-text-webpack-plugin';
 import SriPlugin from 'webpack-subresource-integrity';
-import UglifyJSPlugin from 'uglifyjs-webpack-plugin';
+import webpack from 'webpack';
 import WebpackIsomorphicToolsPlugin from 'webpack-isomorphic-tools/plugin';
 
 import SriDataPlugin from './src/core/server/sriDataPlugin';
@@ -46,15 +46,11 @@ export default {
       allChunks: true,
     }),
     // optimizations
-    new UglifyJSPlugin({
+    new webpack.optimize.UglifyJsPlugin({
       sourceMap: true,
-      uglifyOptions: {
-        output: {
-          comments: false,
-        },
-        compress: {
-          drop_console: true,
-        },
+      comments: false,
+      compress: {
+        drop_console: true,
       },
     }),
     new WebpackIsomorphicToolsPlugin(webpackIsomorphicToolsConfig),
diff --git a/yarn.lock b/yarn.lock
index 0edaf76934..7a0b2b366f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -302,7 +302,7 @@ append-transform@^0.4.0:
   dependencies:
     default-require-extensions "^1.0.0"
 
-aproba@^1.0.3, aproba@^1.1.1:
+aproba@^1.0.3:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/aproba/-/aproba-1.2.0.tgz#6802e6264efd18c790a1b0d517f0f2627bf2c94a"
 
@@ -1234,9 +1234,9 @@ balanced-match@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-1.0.0.tgz#89b4d199ab2bee49de164ea02b89ce462d71b767"
 
-base62@2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/base62/-/base62-2.0.0.tgz#62292693fb0418824caaae6dc19d01fe8bdd9691"
+base62@1.2.8:
+  version "1.2.8"
+  resolved "https://registry.yarnpkg.com/base62/-/base62-1.2.8.tgz#1264cb0fb848d875792877479dbe8bae6bae3428"
 
 base64-js@0.0.2:
   version "0.0.2"
@@ -1298,7 +1298,7 @@ bluebird@^2.9.24:
   version "2.11.0"
   resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-2.11.0.tgz#534b9033c022c9579c56ba3b3e5a5caafbb650e1"
 
-bluebird@^3.0.5, bluebird@^3.5.1:
+bluebird@^3.0.5:
   version "3.5.1"
   resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.5.1.tgz#d9551f9de98f1fcda1e683d17ee91a0602ee2eb9"
 
@@ -1535,24 +1535,6 @@ bytes@3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/bytes/-/bytes-3.0.0.tgz#d32815404d689699f85a4ea4fa8755dd13a96048"
 
-cacache@^10.0.4:
-  version "10.0.4"
-  resolved "https://registry.yarnpkg.com/cacache/-/cacache-10.0.4.tgz#6452367999eff9d4188aefd9a14e9d7c6a263460"
-  dependencies:
-    bluebird "^3.5.1"
-    chownr "^1.0.1"
-    glob "^7.1.2"
-    graceful-fs "^4.1.11"
-    lru-cache "^4.1.1"
-    mississippi "^2.0.0"
-    mkdirp "^0.5.1"
-    move-concurrently "^1.0.1"
-    promise-inflight "^1.0.1"
-    rimraf "^2.6.2"
-    ssri "^5.2.4"
-    unique-filename "^1.1.0"
-    y18n "^4.0.0"
-
 cache-base@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/cache-base/-/cache-base-1.0.1.tgz#0a7f46416831c8b662ee36fe4e7c59d76f666ab2"
@@ -1779,10 +1761,6 @@ chokidar@^2.0.0, chokidar@^2.0.2:
   optionalDependencies:
     fsevents "^1.1.2"
 
-chownr@^1.0.1:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/chownr/-/chownr-1.0.1.tgz#e2a75042a9551908bebd25b8523d5f9769d79181"
-
 ci-info@^1.0.0:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/ci-info/-/ci-info-1.1.3.tgz#710193264bb05c77b8c90d02f5aaf22216a667b2"
@@ -2033,10 +2011,6 @@ commander@^2.11.0, commander@^2.9.0:
   version "2.15.1"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.15.1.tgz#df46e867d0fc2aec66a34662b406a9ccafff5b0f"
 
-commander@~2.13.0:
-  version "2.13.0"
-  resolved "https://registry.yarnpkg.com/commander/-/commander-2.13.0.tgz#6964bca67685df7c1f1430c584f07d7597885b9c"
-
 common-tags@1.7.2:
   version "1.7.2"
   resolved "https://registry.yarnpkg.com/common-tags/-/common-tags-1.7.2.tgz#24d9768c63d253a56ecff93845b44b4df1d52771"
@@ -2087,7 +2061,7 @@ concat-map@0.0.1:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
 
-concat-stream@^1.4.6, concat-stream@^1.4.7, concat-stream@^1.5.0, concat-stream@^1.6.0:
+concat-stream@^1.4.6, concat-stream@^1.4.7, concat-stream@^1.6.0:
   version "1.6.2"
   resolved "https://registry.yarnpkg.com/concat-stream/-/concat-stream-1.6.2.tgz#904bdf194cd3122fc675c77fc4ac3d4ff0fd1a34"
   dependencies:
@@ -2201,17 +2175,6 @@ cookiejar@^2.1.0:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/cookiejar/-/cookiejar-2.1.1.tgz#41ad57b1b555951ec171412a81942b1e8200d34a"
 
-copy-concurrently@^1.0.0:
-  version "1.0.5"
-  resolved "https://registry.yarnpkg.com/copy-concurrently/-/copy-concurrently-1.0.5.tgz#92297398cae34937fcafd6ec8139c18051f0b5e0"
-  dependencies:
-    aproba "^1.1.1"
-    fs-write-stream-atomic "^1.0.8"
-    iferr "^0.1.5"
-    mkdirp "^0.5.1"
-    rimraf "^2.5.4"
-    run-queue "^1.0.0"
-
 copy-descriptor@^0.1.0:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/copy-descriptor/-/copy-descriptor-0.1.1.tgz#676f6eb3c39997c2ee1ac3a924fd6124748f578d"
@@ -2487,10 +2450,6 @@ cvss@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/cvss/-/cvss-1.0.2.tgz#df67e92bf12a796f49e928799c8db3ba74b9fcd6"
 
-cyclist@~0.2.2:
-  version "0.2.2"
-  resolved "https://registry.yarnpkg.com/cyclist/-/cyclist-0.2.2.tgz#1b33792e11e914a2fd6d6ed6447464444e5fa640"
-
 d@1:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/d/-/d-1.0.0.tgz#754bb5bfe55451da69a58b94d45f4c5b0462d58f"
@@ -2867,7 +2826,7 @@ duplexer@~0.1.1:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/duplexer/-/duplexer-0.1.1.tgz#ace6ff808c1ce66b57d1ebf97977acb02334cfc1"
 
-duplexify@^3.2.0, duplexify@^3.4.2, duplexify@^3.5.3:
+duplexify@^3.2.0:
   version "3.5.4"
   resolved "https://registry.yarnpkg.com/duplexify/-/duplexify-3.5.4.tgz#4bb46c1796eabebeec4ca9a2e66b808cb7a3d8b4"
   dependencies:
@@ -2934,7 +2893,7 @@ encoding@^0.1.11, encoding@^0.1.12:
   dependencies:
     iconv-lite "~0.4.13"
 
-end-of-stream@^1.0.0, end-of-stream@^1.1.0:
+end-of-stream@^1.0.0:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/end-of-stream/-/end-of-stream-1.4.1.tgz#ed29634d19baba463b6ce6b80a37213eab71ec43"
   dependencies:
@@ -3007,7 +2966,7 @@ enzyme@^3.2.0:
     raf "^3.4.0"
     rst-selector-parser "^2.2.3"
 
-errno@^0.1.3, errno@~0.1.7:
+errno@^0.1.3:
   version "0.1.7"
   resolved "https://registry.yarnpkg.com/errno/-/errno-0.1.7.tgz#4684d71779ad39af177e3f007996f7c67c852618"
   dependencies:
@@ -3734,13 +3693,6 @@ flow-bin@^0.71.0:
   version "0.71.0"
   resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.71.0.tgz#fd1b27a6458c3ebaa5cb811853182ed631918b70"
 
-flush-write-stream@^1.0.0:
-  version "1.0.3"
-  resolved "https://registry.yarnpkg.com/flush-write-stream/-/flush-write-stream-1.0.3.tgz#c5d586ef38af6097650b49bc41b55fabb19f35bd"
-  dependencies:
-    inherits "^2.0.1"
-    readable-stream "^2.0.4"
-
 for-in@^0.1.3:
   version "0.1.8"
   resolved "https://registry.yarnpkg.com/for-in/-/for-in-0.1.8.tgz#d8773908e31256109952b1fdb9b3fa867d2775e1"
@@ -3813,13 +3765,6 @@ fresh@0.5.2, fresh@^0.5.2:
   version "0.5.2"
   resolved "https://registry.yarnpkg.com/fresh/-/fresh-0.5.2.tgz#3d8cadd90d976569fa835ab1f8e4b23a105605a7"
 
-from2@^2.1.0:
-  version "2.3.0"
-  resolved "https://registry.yarnpkg.com/from2/-/from2-2.3.0.tgz#8bfb5502bde4a4d36cfdeea007fcca21d7e382af"
-  dependencies:
-    inherits "^2.0.1"
-    readable-stream "^2.0.0"
-
 fs-extra@^0.30.0:
   version "0.30.0"
   resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-0.30.0.tgz#f233ffcc08d4da7d432daa449776989db1df93f0"
@@ -3830,15 +3775,6 @@ fs-extra@^0.30.0:
     path-is-absolute "^1.0.0"
     rimraf "^2.2.8"
 
-fs-write-stream-atomic@^1.0.8:
-  version "1.0.10"
-  resolved "https://registry.yarnpkg.com/fs-write-stream-atomic/-/fs-write-stream-atomic-1.0.10.tgz#b47df53493ef911df75731e70a9ded0189db40c9"
-  dependencies:
-    graceful-fs "^4.1.2"
-    iferr "^0.1.5"
-    imurmurhash "^0.1.4"
-    readable-stream "1 || 2"
-
 fs.realpath@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/fs.realpath/-/fs.realpath-1.0.0.tgz#1504ad2523158caa40db4a2787cb01411994ea4f"
@@ -4519,10 +4455,6 @@ ienoopen@1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/ienoopen/-/ienoopen-1.0.0.tgz#346a428f474aac8f50cf3784ea2d0f16f62bda6b"
 
-iferr@^0.1.5:
-  version "0.1.5"
-  resolved "https://registry.yarnpkg.com/iferr/-/iferr-0.1.5.tgz#c60eed69e6d8fdb6b3104a1fcbca1c192dc5b501"
-
 ignore@^3.2.0, ignore@^3.3.3, ignore@^3.3.5:
   version "3.3.7"
   resolved "https://registry.yarnpkg.com/ignore/-/ignore-3.3.7.tgz#612289bfb3c220e186a58118618d5be8c1bab021"
@@ -5918,7 +5850,7 @@ lru-cache@^3.2.0:
   dependencies:
     pseudomap "^1.0.1"
 
-lru-cache@^4.0.0, lru-cache@^4.0.1, lru-cache@^4.1.1:
+lru-cache@^4.0.0, lru-cache@^4.0.1:
   version "4.1.2"
   resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-4.1.2.tgz#45234b2e6e2f2b33da125624c4664929a0224c3f"
   dependencies:
@@ -6177,21 +6109,6 @@ minimist@~0.0.1:
   version "0.0.10"
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.10.tgz#de3f98543dbf96082be48ad1a0c7cda836301dcf"
 
-mississippi@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/mississippi/-/mississippi-2.0.0.tgz#3442a508fafc28500486feea99409676e4ee5a6f"
-  dependencies:
-    concat-stream "^1.5.0"
-    duplexify "^3.4.2"
-    end-of-stream "^1.1.0"
-    flush-write-stream "^1.0.0"
-    from2 "^2.1.0"
-    parallel-transform "^1.1.0"
-    pump "^2.0.1"
-    pumpify "^1.3.3"
-    stream-each "^1.1.0"
-    through2 "^2.0.0"
-
 mixin-deep@^1.2.0:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/mixin-deep/-/mixin-deep-1.3.1.tgz#a49e7268dce1a0d9698e45326c5626df3543d0fe"
@@ -6256,17 +6173,6 @@ moment@2.22.1, moment@^2.10.6:
   version "2.22.1"
   resolved "https://registry.yarnpkg.com/moment/-/moment-2.22.1.tgz#529a2e9bf973f259c9643d237fda84de3a26e8ad"
 
-move-concurrently@^1.0.1:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/move-concurrently/-/move-concurrently-1.0.1.tgz#be2c005fda32e0b29af1f05d7c4b33214c701f92"
-  dependencies:
-    aproba "^1.1.1"
-    copy-concurrently "^1.0.0"
-    fs-write-stream-atomic "^1.0.8"
-    mkdirp "^0.5.1"
-    rimraf "^2.5.4"
-    run-queue "^1.0.3"
-
 mozilla-version-comparator@1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/mozilla-version-comparator/-/mozilla-version-comparator-1.0.2.tgz#f86731e70c15d1ff5eb288d13b4db8d1e605f7fc"
@@ -6734,7 +6640,7 @@ on-headers@~1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/on-headers/-/on-headers-1.0.1.tgz#928f5d0f470d49342651ea6794b0857c100693f7"
 
-once@^1.3.0, once@^1.3.1, once@^1.3.3, once@^1.4.0:
+once@^1.3.0, once@^1.3.3, once@^1.4.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/once/-/once-1.4.0.tgz#583b1aa775961d4b113ac17d9c50baef9dd76bd1"
   dependencies:
@@ -6878,14 +6784,6 @@ pako@~1.0.5:
   version "1.0.6"
   resolved "https://registry.yarnpkg.com/pako/-/pako-1.0.6.tgz#0101211baa70c4bca4a0f63f2206e97b7dfaf258"
 
-parallel-transform@^1.1.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/parallel-transform/-/parallel-transform-1.1.0.tgz#d410f065b05da23081fcd10f28854c29bda33b06"
-  dependencies:
-    cyclist "~0.2.2"
-    inherits "^2.0.3"
-    readable-stream "^2.1.5"
-
 parse-asn1@^5.0.0:
   version "5.1.1"
   resolved "https://registry.yarnpkg.com/parse-asn1/-/parse-asn1-5.1.1.tgz#f6bf293818332bd0dab54efb16087724745e6ca8"
@@ -7558,10 +7456,6 @@ progress@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/progress/-/progress-2.0.0.tgz#8a1be366bf8fc23db2bd23f10c6fe920b4389d1f"
 
-promise-inflight@^1.0.1:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/promise-inflight/-/promise-inflight-1.0.1.tgz#98472870bf228132fcbdd868129bad12c3c029e3"
-
 "promise@>=3.2 <8", promise@^7.1.1:
   version "7.3.1"
   resolved "https://registry.yarnpkg.com/promise/-/promise-7.3.1.tgz#064b72602b18f90f29192b8b1bc418ffd1ebd3bf"
@@ -7612,21 +7506,6 @@ public-encrypt@^4.0.0:
     parse-asn1 "^5.0.0"
     randombytes "^2.0.1"
 
-pump@^2.0.0, pump@^2.0.1:
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/pump/-/pump-2.0.1.tgz#12399add6e4cf7526d973cbc8b5ce2e2908b3909"
-  dependencies:
-    end-of-stream "^1.1.0"
-    once "^1.3.1"
-
-pumpify@^1.3.3:
-  version "1.4.0"
-  resolved "https://registry.yarnpkg.com/pumpify/-/pumpify-1.4.0.tgz#80b7c5df7e24153d03f0e7ac8a05a5d068bd07fb"
-  dependencies:
-    duplexify "^3.5.3"
-    inherits "^2.0.3"
-    pump "^2.0.0"
-
 punycode@1.3.2:
   version "1.3.2"
   resolved "https://registry.yarnpkg.com/punycode/-/punycode-1.3.2.tgz#9653a036fb7c1ee42342f2325cceefea3926c48d"
@@ -8046,18 +7925,6 @@ read-pkg@^3.0.0:
     normalize-package-data "^2.3.2"
     path-type "^3.0.0"
 
-"readable-stream@1 || 2", readable-stream@^2.0.0, readable-stream@^2.0.1, readable-stream@^2.0.2, readable-stream@^2.0.4, readable-stream@^2.0.5, readable-stream@^2.0.6, readable-stream@^2.1.4, readable-stream@^2.1.5, readable-stream@^2.2.2, readable-stream@^2.2.9, readable-stream@^2.3.3:
-  version "2.3.6"
-  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.3.6.tgz#b11c27d88b8ff1fbe070643cf94b0c79ae1b0aaf"
-  dependencies:
-    core-util-is "~1.0.0"
-    inherits "~2.0.3"
-    isarray "~1.0.0"
-    process-nextick-args "~2.0.0"
-    safe-buffer "~5.1.1"
-    string_decoder "~1.1.1"
-    util-deprecate "~1.0.1"
-
 "readable-stream@>=1.0.33-1 <1.1.0-0":
   version "1.0.34"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-1.0.34.tgz#125820e34bc842d2f2aaafafe4c2916ee32c157c"
@@ -8076,6 +7943,18 @@ readable-stream@^1.0.33, readable-stream@~1.1.9:
     isarray "0.0.1"
     string_decoder "~0.10.x"
 
+readable-stream@^2.0.0, readable-stream@^2.0.1, readable-stream@^2.0.2, readable-stream@^2.0.5, readable-stream@^2.0.6, readable-stream@^2.1.4, readable-stream@^2.2.2, readable-stream@^2.2.9, readable-stream@^2.3.3:
+  version "2.3.6"
+  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.3.6.tgz#b11c27d88b8ff1fbe070643cf94b0c79ae1b0aaf"
+  dependencies:
+    core-util-is "~1.0.0"
+    inherits "~2.0.3"
+    isarray "~1.0.0"
+    process-nextick-args "~2.0.0"
+    safe-buffer "~5.1.1"
+    string_decoder "~1.1.1"
+    util-deprecate "~1.0.1"
+
 readdirp@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/readdirp/-/readdirp-2.1.0.tgz#4ed0ad060df3073300c48440373f72d1cc642d78"
@@ -8514,7 +8393,7 @@ right-align@^0.1.1:
   dependencies:
     align-text "^0.1.1"
 
-rimraf@2, rimraf@^2.2.8, rimraf@^2.5.1, rimraf@^2.5.4, rimraf@^2.6.1, rimraf@^2.6.2:
+rimraf@2, rimraf@^2.2.8, rimraf@^2.5.1, rimraf@^2.5.4, rimraf@^2.6.1:
   version "2.6.2"
   resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.6.2.tgz#2ed8150d24a16ea8651e6d6ef0f47c4158ce7a36"
   dependencies:
@@ -8546,12 +8425,6 @@ run-async@^2.2.0:
   dependencies:
     is-promise "^2.1.0"
 
-run-queue@^1.0.0, run-queue@^1.0.3:
-  version "1.0.3"
-  resolved "https://registry.yarnpkg.com/run-queue/-/run-queue-1.0.3.tgz#e848396f057d223f24386924618e25694161ec47"
-  dependencies:
-    aproba "^1.1.1"
-
 rx-lite-aggregates@^4.0.8:
   version "4.0.8"
   resolved "https://registry.yarnpkg.com/rx-lite-aggregates/-/rx-lite-aggregates-4.0.8.tgz#753b87a89a11c95467c4ac1626c4efc4e05c67be"
@@ -8720,7 +8593,7 @@ send@0.16.2, send@^0.16.1:
     range-parser "~1.2.0"
     statuses "~1.4.0"
 
-serialize-javascript@1.5.0, serialize-javascript@^1.4.0:
+serialize-javascript@1.5.0:
   version "1.5.0"
   resolved "https://registry.yarnpkg.com/serialize-javascript/-/serialize-javascript-1.5.0.tgz#1aa336162c88a890ddad5384baebc93a655161fe"
 
@@ -9242,12 +9115,6 @@ sshpk@^1.7.0:
     jsbn "~0.1.0"
     tweetnacl "~0.14.0"
 
-ssri@^5.2.4:
-  version "5.3.0"
-  resolved "https://registry.yarnpkg.com/ssri/-/ssri-5.3.0.tgz#ba3872c9c6d33a0704a7d71ff045e5ec48999d06"
-  dependencies:
-    safe-buffer "^5.1.1"
-
 stack-trace@0.0.10:
   version "0.0.10"
   resolved "https://registry.yarnpkg.com/stack-trace/-/stack-trace-0.0.10.tgz#547c70b347e8d32b4e108ea1a2a159e5fdde19c0"
@@ -9307,13 +9174,6 @@ stream-combiner@^0.2.1:
     duplexer "~0.1.1"
     through "~2.3.4"
 
-stream-each@^1.1.0:
-  version "1.2.2"
-  resolved "https://registry.yarnpkg.com/stream-each/-/stream-each-1.2.2.tgz#8e8c463f91da8991778765873fe4d960d8f616bd"
-  dependencies:
-    end-of-stream "^1.1.0"
-    stream-shift "^1.0.0"
-
 stream-http@^2.7.2:
   version "2.8.1"
   resolved "https://registry.yarnpkg.com/stream-http/-/stream-http-2.8.1.tgz#d0441be1a457a73a733a8a7b53570bebd9ef66a4"
@@ -9814,13 +9674,6 @@ through2@^0.6.1, through2@^0.6.3, through2@~0.6.1:
     readable-stream ">=1.0.33-1 <1.1.0-0"
     xtend ">=4.0.0 <4.1.0-0"
 
-through2@^2.0.0:
-  version "2.0.3"
-  resolved "https://registry.yarnpkg.com/through2/-/through2-2.0.3.tgz#0004569b37c7c74ba39c43f3ced78d1ad94140be"
-  dependencies:
-    readable-stream "^2.1.5"
-    xtend "~4.0.1"
-
 "through@>=2.2.7 <3", through@^2.3.6, through@~2.3.4:
   version "2.3.8"
   resolved "https://registry.yarnpkg.com/through/-/through-2.3.8.tgz#0dd4c9ffaabc357960b1b724115d7e0e86a2e1f5"
@@ -9996,13 +9849,6 @@ ua-parser-js@0.7.17, ua-parser-js@^0.7.9:
   version "0.7.17"
   resolved "https://registry.yarnpkg.com/ua-parser-js/-/ua-parser-js-0.7.17.tgz#e9ec5f9498b9ec910e7ae3ac626a805c4d09ecac"
 
-uglify-es@^3.3.4:
-  version "3.3.9"
-  resolved "https://registry.yarnpkg.com/uglify-es/-/uglify-es-3.3.9.tgz#0c1c4f0700bed8dbc124cdb304d2592ca203e677"
-  dependencies:
-    commander "~2.13.0"
-    source-map "~0.6.1"
-
 uglify-js@^2.6, uglify-js@^2.7.0, uglify-js@^2.8.29:
   version "2.8.29"
   resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-2.8.29.tgz#29c5733148057bb4e1f75df35b7a9cb72e6a59dd"
@@ -10024,19 +9870,6 @@ uglifyjs-webpack-plugin@^0.4.6:
     uglify-js "^2.8.29"
     webpack-sources "^1.0.1"
 
-uglifyjs-webpack-plugin@^1.2.5:
-  version "1.2.5"
-  resolved "https://registry.yarnpkg.com/uglifyjs-webpack-plugin/-/uglifyjs-webpack-plugin-1.2.5.tgz#2ef8387c8f1a903ec5e44fa36f9f3cbdcea67641"
-  dependencies:
-    cacache "^10.0.4"
-    find-cache-dir "^1.0.0"
-    schema-utils "^0.4.5"
-    serialize-javascript "^1.4.0"
-    source-map "^0.6.1"
-    uglify-es "^3.3.4"
-    webpack-sources "^1.1.0"
-    worker-farm "^1.5.2"
-
 uid-number@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/uid-number/-/uid-number-0.0.6.tgz#0ea10e8035e8eb5b8e4449f06da1c730663baa81"
@@ -10095,18 +9928,6 @@ uniqs@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/uniqs/-/uniqs-2.0.0.tgz#ffede4b36b25290696e6e165d4a59edb998e6b02"
 
-unique-filename@^1.1.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/unique-filename/-/unique-filename-1.1.0.tgz#d05f2fe4032560871f30e93cbe735eea201514f3"
-  dependencies:
-    unique-slug "^2.0.0"
-
-unique-slug@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/unique-slug/-/unique-slug-2.0.0.tgz#db6676e7c7cc0629878ff196097c78855ae9f4ab"
-  dependencies:
-    imurmurhash "^0.1.4"
-
 unist-util-find-all-after@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/unist-util-find-all-after/-/unist-util-find-all-after-1.0.1.tgz#4e5512abfef7e0616781aecf7b1ed751c00af908"
@@ -10460,7 +10281,7 @@ webpack-log@^1.0.1, webpack-log@^1.1.2:
     loglevelnext "^1.0.1"
     uuid "^3.1.0"
 
-webpack-sources@^1.0.1, webpack-sources@^1.1.0:
+webpack-sources@^1.0.1:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/webpack-sources/-/webpack-sources-1.1.0.tgz#a101ebae59d6507354d71d8013950a3a8b7a5a54"
   dependencies:
@@ -10593,12 +10414,6 @@ wordwrap@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-1.0.0.tgz#27584810891456a4171c8d0226441ade90cbcaeb"
 
-worker-farm@^1.5.2:
-  version "1.6.0"
-  resolved "https://registry.yarnpkg.com/worker-farm/-/worker-farm-1.6.0.tgz#aecc405976fab5a95526180846f0dba288f3a4a0"
-  dependencies:
-    errno "~0.1.7"
-
 wrap-ansi@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/wrap-ansi/-/wrap-ansi-2.1.0.tgz#d8fc3d284dd05794fe84973caecdd1cf824fdd85"
@@ -10683,7 +10498,7 @@ xmlbuilder@~9.0.1:
   version "9.0.7"
   resolved "https://registry.yarnpkg.com/xmlbuilder/-/xmlbuilder-9.0.7.tgz#132ee63d2ec5565c557e20f4c22df9aca686b10d"
 
-"xtend@>=4.0.0 <4.1.0-0", xtend@^4.0.0, xtend@^4.0.1, xtend@~4.0.1:
+"xtend@>=4.0.0 <4.1.0-0", xtend@^4.0.0, xtend@^4.0.1:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/xtend/-/xtend-4.0.1.tgz#a5c6d532be656e23db820efb943a1f04998d63af"
 
@@ -10691,10 +10506,6 @@ y18n@^3.2.0, y18n@^3.2.1:
   version "3.2.1"
   resolved "https://registry.yarnpkg.com/y18n/-/y18n-3.2.1.tgz#6d15fba884c08679c0d77e88e7759e811e07fa41"
 
-y18n@^4.0.0:
-  version "4.0.0"
-  resolved "https://registry.yarnpkg.com/y18n/-/y18n-4.0.0.tgz#95ef94f85ecc81d007c264e190a120f0a3c8566b"
-
 yallist@^2.1.2:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/yallist/-/yallist-2.1.2.tgz#1c11f9218f076089a47dd512f93c6699a6a81d52"