diff --git a/js/libtextsecure.js b/js/libtextsecure.js
index 7810b2d479..576c291fa7 100644
--- a/js/libtextsecure.js
+++ b/js/libtextsecure.js
@@ -37461,7 +37461,19 @@ var TextSecureServer = (function() {
     }
 
     function createSocket(url) {
-      var requestOptions = { ca: window.config.certificateAuthorities };
+      var proxyUrl = window.getProxyForUrl(url);
+      var requestOptions;
+      if (proxyUrl) {
+        console.log('createSocket: using proxy url', proxyUrl);
+        requestOptions = {
+            agent: ProxyAgent(proxyUrl)
+        };
+      } else {
+        requestOptions = {
+            ca: window.config.certificateAuthorities,
+        };
+      }
+
       return new nodeWebSocket(url, null, null, null, requestOptions);
     }
 
@@ -37475,12 +37487,23 @@ var TextSecureServer = (function() {
         console.log(options.type, url);
         var timeout = typeof options.timeout !== 'undefined' ? options.timeout : 10000;
 
+        var proxyUrl = window.getProxyForUrl(url);
+        var agent;
+        if (proxyUrl) {
+            console.log('promixe_ajax: using proxy url', proxyUrl);
+            agent = new ProxyAgent(proxyUrl);
+        } else {
+            agent = new httpsAgent({
+                ca: options.certificateAuthorities
+            });
+        }
+
         var fetchOptions = {
           method: options.type,
           body: options.data || null,
           headers: { 'X-Signal-Agent': 'OWD' },
-          agent: new httpsAgent({ca: options.certificateAuthorities}),
-          timeout: timeout
+          agent: agent,
+          timeout: timeout,
         };
 
         if (fetchOptions.body instanceof ArrayBuffer) {
diff --git a/libtextsecure/api.js b/libtextsecure/api.js
index 9f44f64d8d..da9dd4a734 100644
--- a/libtextsecure/api.js
+++ b/libtextsecure/api.js
@@ -25,7 +25,19 @@ var TextSecureServer = (function() {
     }
 
     function createSocket(url) {
-      var requestOptions = { ca: window.config.certificateAuthorities };
+      var proxyUrl = window.getProxyForUrl(url);
+      var requestOptions;
+      if (proxyUrl) {
+        console.log('createSocket: using proxy url', proxyUrl);
+        requestOptions = {
+            agent: ProxyAgent(proxyUrl)
+        };
+      } else {
+        requestOptions = {
+            ca: window.config.certificateAuthorities,
+        };
+      }
+
       return new nodeWebSocket(url, null, null, null, requestOptions);
     }
 
@@ -39,12 +51,23 @@ var TextSecureServer = (function() {
         console.log(options.type, url);
         var timeout = typeof options.timeout !== 'undefined' ? options.timeout : 10000;
 
+        var proxyUrl = window.getProxyForUrl(url);
+        var agent;
+        if (proxyUrl) {
+            console.log('promixe_ajax: using proxy url', proxyUrl);
+            agent = new ProxyAgent(proxyUrl);
+        } else {
+            agent = new httpsAgent({
+                ca: options.certificateAuthorities
+            });
+        }
+
         var fetchOptions = {
           method: options.type,
           body: options.data || null,
           headers: { 'X-Signal-Agent': 'OWD' },
-          agent: new httpsAgent({ca: options.certificateAuthorities}),
-          timeout: timeout
+          agent: agent,
+          timeout: timeout,
         };
 
         if (fetchOptions.body instanceof ArrayBuffer) {
diff --git a/package.json b/package.json
index 96d2a6e53e..d0576c26b1 100644
--- a/package.json
+++ b/package.json
@@ -165,6 +165,8 @@
     "node-fetch": "^1.7.3",
     "node-notifier": "^5.1.2",
     "os-locale": "^2.1.0",
+    "proxy-agent": "^2.1.0",
+    "proxy-from-env": "^1.0.0",
     "rimraf": "^2.6.2",
     "semver": "^5.4.1",
     "spellchecker": "^3.4.3",
diff --git a/preload.js b/preload.js
index 7624a6db1e..67345f0eed 100644
--- a/preload.js
+++ b/preload.js
@@ -52,6 +52,8 @@
     window.nodeSetImmediate(function() {});
   }, 1000);
 
+  window.getProxyForUrl = require('proxy-from-env').getProxyForUrl;
+  window.ProxyAgent = require('proxy-agent');
   window.EmojiConvertor = require('emoji-js');
   window.emojiData = require('emoji-datasource');
   window.nodeFetch = require('node-fetch');
diff --git a/yarn.lock b/yarn.lock
index ef967c4d55..9d31353e37 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -34,6 +34,19 @@ abbrev@1:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/abbrev/-/abbrev-1.1.0.tgz#d0554c2256636e2f56e7c2e5ad183f859428d81f"
 
+agent-base@2, agent-base@^2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/agent-base/-/agent-base-2.1.1.tgz#d6de10d5af6132d5bd692427d46fc538539094c7"
+  dependencies:
+    extend "~3.0.0"
+    semver "~5.0.1"
+
+agent-base@^4.1.0:
+  version "4.1.2"
+  resolved "https://registry.yarnpkg.com/agent-base/-/agent-base-4.1.2.tgz#80fa6cde440f4dcf9af2617cf246099b5d99f0c8"
+  dependencies:
+    es6-promisify "^5.0.0"
+
 ajv-keywords@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-2.1.0.tgz#a296e17f7bfae7c1ce4f7e0de53d29cb32162df0"
@@ -203,6 +216,10 @@ assert-plus@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/assert-plus/-/assert-plus-0.2.0.tgz#d74e1b87e7affc0db8aadb7021f3fe48101ab234"
 
+ast-types@0.x.x:
+  version "0.10.1"
+  resolved "https://registry.yarnpkg.com/ast-types/-/ast-types-0.10.1.tgz#f52fca9715579a14f841d67d7f8d25432ab6a3dd"
+
 async-exit-hook@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/async-exit-hook/-/async-exit-hook-2.0.1.tgz#8bd8b024b0ec9b1c01cccb9af9db29bd717dfaf3"
@@ -466,6 +483,10 @@ bytes@2.4.0:
   version "2.4.0"
   resolved "https://registry.yarnpkg.com/bytes/-/bytes-2.4.0.tgz#7d97196f9d5baf7f6935e25985549edd2a6c2339"
 
+bytes@3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/bytes/-/bytes-3.0.0.tgz#d32815404d689699f85a4ea4fa8755dd13a96048"
+
 camelcase-keys@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/camelcase-keys/-/camelcase-keys-2.1.0.tgz#308beeaffdf28119051efa1d932213c91b8f92e7"
@@ -799,6 +820,10 @@ dashdash@^1.12.0:
   dependencies:
     assert-plus "^1.0.0"
 
+data-uri-to-buffer@1:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/data-uri-to-buffer/-/data-uri-to-buffer-1.2.0.tgz#77163ea9c20d8641b4707e8f18abdf9a78f34835"
+
 date-now@^0.1.4:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/date-now/-/date-now-0.1.4.tgz#eaf439fd4d4848ad74e5cc7dbef200672b9e345b"
@@ -814,6 +839,12 @@ debug@0.7.4:
   version "0.7.4"
   resolved "https://registry.yarnpkg.com/debug/-/debug-0.7.4.tgz#06e1ea8082c2cb14e39806e22e2f6f757f92af39"
 
+debug@2:
+  version "2.6.9"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.9.tgz#5d128515df134ff327e90a4c93f4e077a536341f"
+  dependencies:
+    ms "2.0.0"
+
 debug@^2.1.3, debug@^2.2.0, debug@^2.6.8:
   version "2.6.8"
   resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.8.tgz#e731531ca2ede27d188222427da17821d68ff4fc"
@@ -862,10 +893,22 @@ deep-extend@~0.4.0:
   version "0.4.1"
   resolved "https://registry.yarnpkg.com/deep-extend/-/deep-extend-0.4.1.tgz#efe4113d08085f4e6f9687759810f807469e2253"
 
+deep-is@~0.1.3:
+  version "0.1.3"
+  resolved "https://registry.yarnpkg.com/deep-is/-/deep-is-0.1.3.tgz#b369d6fb5dbc13eecf524f91b070feedc357cf34"
+
 deepmerge@~1.3.2:
   version "1.3.2"
   resolved "https://registry.yarnpkg.com/deepmerge/-/deepmerge-1.3.2.tgz#1663691629d4dbfe364fa12a2a4f0aa86aa3a050"
 
+degenerator@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/degenerator/-/degenerator-1.0.4.tgz#fcf490a37ece266464d9cc431ab98c5819ced095"
+  dependencies:
+    ast-types "0.x.x"
+    escodegen "1.x.x"
+    esprima "3.x.x"
+
 del@^2.2.2:
   version "2.2.2"
   resolved "https://registry.yarnpkg.com/del/-/del-2.2.2.tgz#c12c981d067846c84bcaf862cff930d907ffd1a8"
@@ -886,6 +929,10 @@ delegates@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/delegates/-/delegates-1.0.0.tgz#84c6e159b81904fdca59a0ef44cd870d31250f9a"
 
+depd@1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/depd/-/depd-1.1.1.tgz#5783b4e1c459f06fa5ca27f991f3d06e7a310359"
+
 depd@~1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/depd/-/depd-1.1.0.tgz#e1bd82c6aab6ced965b97b88b17ed3e528ca18c3"
@@ -1215,6 +1262,10 @@ es6-promise@^3.0.2:
   version "3.3.1"
   resolved "https://registry.yarnpkg.com/es6-promise/-/es6-promise-3.3.1.tgz#a08cdde84ccdbf34d027a1451bc91d4bcd28a613"
 
+es6-promise@^4.0.3:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/es6-promise/-/es6-promise-4.1.1.tgz#8811e90915d9a0dba36274f0b242dbda78f9c92a"
+
 es6-promise@^4.0.5:
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/es6-promise/-/es6-promise-4.1.0.tgz#dda03ca8f9f89bc597e689842929de7ba8cebdf0"
@@ -1223,10 +1274,31 @@ es6-promise@~4.0.3:
   version "4.0.5"
   resolved "https://registry.yarnpkg.com/es6-promise/-/es6-promise-4.0.5.tgz#7882f30adde5b240ccfa7f7d78c548330951ae42"
 
+es6-promisify@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/es6-promisify/-/es6-promisify-5.0.0.tgz#5109d62f3e56ea967c4b63505aef08291c8a5203"
+  dependencies:
+    es6-promise "^4.0.3"
+
 escape-string-regexp@^1.0.2, escape-string-regexp@^1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"
 
+escodegen@1.x.x:
+  version "1.9.0"
+  resolved "https://registry.yarnpkg.com/escodegen/-/escodegen-1.9.0.tgz#9811a2f265dc1cd3894420ee3717064b632b8852"
+  dependencies:
+    esprima "^3.1.3"
+    estraverse "^4.2.0"
+    esutils "^2.0.2"
+    optionator "^0.8.1"
+  optionalDependencies:
+    source-map "~0.5.6"
+
+esprima@3.x.x, esprima@^3.1.3:
+  version "3.1.3"
+  resolved "https://registry.yarnpkg.com/esprima/-/esprima-3.1.3.tgz#fdca51cee6133895e3c88d535ce49dbff62a4633"
+
 esprima@^2.6.0:
   version "2.7.3"
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-2.7.3.tgz#96e3b70d5779f6ad49cd032673d1c312767ba581"
@@ -1235,10 +1307,14 @@ esprima@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.0.tgz#4499eddcd1110e0b218bacf2fa7f7f59f55ca804"
 
-estraverse@^4.1.0:
+estraverse@^4.1.0, estraverse@^4.2.0:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/estraverse/-/estraverse-4.2.0.tgz#0dee3fed31fcd469618ce7342099fc1afa0bdb13"
 
+esutils@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/esutils/-/esutils-2.0.2.tgz#0abf4f1caa5bcb1f7a9d8acc6dea4faaa04bac9b"
+
 eventemitter2@~0.4.13:
   version "0.4.14"
   resolved "https://registry.yarnpkg.com/eventemitter2/-/eventemitter2-0.4.14.tgz#8f61b75cde012b2e9eb284d4545583b5643b61ab"
@@ -1271,6 +1347,10 @@ expand-template@^1.0.2:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/expand-template/-/expand-template-1.1.0.tgz#e09efba977bf98f9ee0ed25abd0c692e02aec3fc"
 
+extend@3:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.1.tgz#a755ea7bc1adfcc5a31ce7e762dbaadc5e636444"
+
 extend@~3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.0.tgz#5a474353b9f3353ddd8176dfd37b91c83a46f1d4"
@@ -1315,6 +1395,10 @@ fast-json-stable-stringify@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/fast-json-stable-stringify/-/fast-json-stable-stringify-2.0.0.tgz#d5142c0caee6b1189f87d3a76111064f86c8bbf2"
 
+fast-levenshtein@~2.0.4:
+  version "2.0.6"
+  resolved "https://registry.yarnpkg.com/fast-levenshtein/-/fast-levenshtein-2.0.6.tgz#3d8a5c66883a16a30ca8643e851f19baa7797917"
+
 faye-websocket@~0.10.0:
   version "0.10.0"
   resolved "https://registry.yarnpkg.com/faye-websocket/-/faye-websocket-0.10.0.tgz#4e492f8d04dfb6f89003507f6edbf2d501e7c6f4"
@@ -1341,6 +1425,10 @@ file-type@^3.1.0:
   version "3.9.0"
   resolved "https://registry.yarnpkg.com/file-type/-/file-type-3.9.0.tgz#257a078384d1db8087bc449d107d52a52672b9e9"
 
+file-uri-to-path@1:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/file-uri-to-path/-/file-uri-to-path-1.0.0.tgz#553a7b8446ff6f684359c445f1e37a05dacc33dd"
+
 file-url@^2.0.0:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/file-url/-/file-url-2.0.2.tgz#e951784d79095127d3713029ab063f40818ca2ae"
@@ -1438,6 +1526,13 @@ fstream@^1.0.0, fstream@^1.0.2:
     mkdirp ">=0.5 0"
     rimraf "2"
 
+ftp@~0.3.10:
+  version "0.3.10"
+  resolved "https://registry.yarnpkg.com/ftp/-/ftp-0.3.10.tgz#9197d861ad8142f3e63d5a83bfe4c59f7330885d"
+  dependencies:
+    readable-stream "1.1.x"
+    xregexp "2.0.0"
+
 gauge@~2.7.1, gauge@~2.7.3:
   version "2.7.4"
   resolved "https://registry.yarnpkg.com/gauge/-/gauge-2.7.4.tgz#2c03405c7538c39d7eb37b317022e325fb018bf7"
@@ -1479,6 +1574,17 @@ get-stream@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/get-stream/-/get-stream-3.0.0.tgz#8e943d1358dc37555054ecbe2edb05aa174ede14"
 
+get-uri@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/get-uri/-/get-uri-2.0.1.tgz#dbdcacacd8c608a38316869368117697a1631c59"
+  dependencies:
+    data-uri-to-buffer "1"
+    debug "2"
+    extend "3"
+    file-uri-to-path "1"
+    ftp "~0.3.10"
+    readable-stream "2"
+
 getobject@~0.1.0:
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/getobject/-/getobject-0.1.0.tgz#047a449789fa160d018f5486ed91320b6ec7885c"
@@ -1806,6 +1912,15 @@ htmlparser2@3.8.3, htmlparser2@3.8.x:
     entities "1.0"
     readable-stream "1.1"
 
+http-errors@1.6.2:
+  version "1.6.2"
+  resolved "https://registry.yarnpkg.com/http-errors/-/http-errors-1.6.2.tgz#0a002cc85707192a7e7946ceedc11155f60ec736"
+  dependencies:
+    depd "1.1.1"
+    inherits "2.0.3"
+    setprototypeof "1.0.3"
+    statuses ">= 1.3.1 < 2"
+
 http-errors@~1.3.1:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/http-errors/-/http-errors-1.3.1.tgz#197e22cdebd4198585e8694ef6786197b91ed942"
@@ -1813,6 +1928,14 @@ http-errors@~1.3.1:
     inherits "~2.0.1"
     statuses "1"
 
+http-proxy-agent@1, http-proxy-agent@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/http-proxy-agent/-/http-proxy-agent-1.0.0.tgz#cc1ce38e453bf984a0f7702d2dd59c73d081284a"
+  dependencies:
+    agent-base "2"
+    debug "2"
+    extend "3"
+
 http-signature@~1.1.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/http-signature/-/http-signature-1.1.1.tgz#df72e267066cd0ac67fb76adf8e134a8fbcf91bf"
@@ -1821,6 +1944,14 @@ http-signature@~1.1.0:
     jsprim "^1.2.2"
     sshpk "^1.7.0"
 
+https-proxy-agent@1, https-proxy-agent@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/https-proxy-agent/-/https-proxy-agent-1.0.0.tgz#35f7da6c48ce4ddbfa264891ac593ee5ff8671e6"
+  dependencies:
+    agent-base "2"
+    debug "2"
+    extend "3"
+
 i@0.3.x:
   version "0.3.5"
   resolved "https://registry.yarnpkg.com/i/-/i-0.3.5.tgz#1d2b854158ec8169113c6cb7f6b6801e99e211d5"
@@ -1839,7 +1970,7 @@ iconv-lite@0.4.13, iconv-lite@~0.4.13:
   version "0.4.13"
   resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.13.tgz#1f88aba4ab0b1508e8312acc39345f36e992e2f2"
 
-iconv-lite@^0.4.19:
+iconv-lite@0.4.19, iconv-lite@^0.4.19:
   version "0.4.19"
   resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.19.tgz#f7468f60135f5e5dad3399c0a81be9a1603a082b"
 
@@ -1876,7 +2007,7 @@ inherit@^2.2.2:
   version "2.2.6"
   resolved "https://registry.yarnpkg.com/inherit/-/inherit-2.2.6.tgz#f1614b06c8544e8128e4229c86347db73ad9788d"
 
-inherits@2, inherits@^2.0.1, inherits@~2.0.0, inherits@~2.0.1:
+inherits@2, inherits@2.0.3, inherits@^2.0.1, inherits@~2.0.0, inherits@~2.0.1, inherits@~2.0.3:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"
 
@@ -1918,6 +2049,10 @@ ip-regex@^1.0.1:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/ip-regex/-/ip-regex-1.0.3.tgz#dc589076f659f419c222039a33316f1c7387effd"
 
+ip@^1.1.4, ip@^1.1.5:
+  version "1.1.5"
+  resolved "https://registry.yarnpkg.com/ip/-/ip-1.1.5.tgz#bdded70114290828c0a039e72ef25f5aaec4354a"
+
 is-arrayish@^0.2.1:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/is-arrayish/-/is-arrayish-0.2.1.tgz#77c99840527aa8ecb1a8ba697b80645a7a926a9d"
@@ -2261,6 +2396,13 @@ lcid@^1.0.0:
   dependencies:
     invert-kv "^1.0.0"
 
+levn@~0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/levn/-/levn-0.3.0.tgz#3b09924edf9f083c0490fdd4c0bc4421e04764ee"
+  dependencies:
+    prelude-ls "~1.1.2"
+    type-check "~0.3.2"
+
 livereload-js@^2.2.0:
   version "2.2.2"
   resolved "https://registry.yarnpkg.com/livereload-js/-/livereload-js-2.2.2.tgz#6c87257e648ab475bc24ea257457edcc1f8d0bc2"
@@ -2376,6 +2518,10 @@ lru-cache@^4.0.1:
     pseudomap "^1.0.1"
     yallist "^2.0.0"
 
+lru-cache@~2.6.5:
+  version "2.6.5"
+  resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-2.6.5.tgz#e56d6354148ede8d7707b58d143220fd08df0fd5"
+
 make-dir@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/make-dir/-/make-dir-1.0.0.tgz#97a011751e91dd87cfadef58832ebb04936de978"
@@ -2527,6 +2673,10 @@ ncp@~2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/ncp/-/ncp-2.0.0.tgz#195a21d6c46e361d2fb1281ba38b91e9df7bdbb3"
 
+netmask@^1.0.6:
+  version "1.0.6"
+  resolved "https://registry.yarnpkg.com/netmask/-/netmask-1.0.6.tgz#20297e89d86f6f6400f250d9f4f6b4c1945fcd35"
+
 node-abi@^2.1.1:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/node-abi/-/node-abi-2.1.2.tgz#4da6caceb6685fcd31e7dd1994ef6bb7d0a9c0b2"
@@ -2725,6 +2875,17 @@ optimist@~0.6.1:
     minimist "~0.0.1"
     wordwrap "~0.0.2"
 
+optionator@^0.8.1:
+  version "0.8.2"
+  resolved "https://registry.yarnpkg.com/optionator/-/optionator-0.8.2.tgz#364c5e409d3f4d6301d6c0b4c05bba50180aeb64"
+  dependencies:
+    deep-is "~0.1.3"
+    fast-levenshtein "~2.0.4"
+    levn "~0.3.0"
+    prelude-ls "~1.1.2"
+    type-check "~0.3.2"
+    wordwrap "~1.0.0"
+
 os-homedir@1.0.2, os-homedir@^1.0.0, os-homedir@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/os-homedir/-/os-homedir-1.0.2.tgz#ffbc4988336e0e833de0c168c7ef152121aa7fb3"
@@ -2768,6 +2929,29 @@ p-locate@^2.0.0:
   dependencies:
     p-limit "^1.1.0"
 
+pac-proxy-agent@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/pac-proxy-agent/-/pac-proxy-agent-2.0.0.tgz#beb17cd2b06a20b379d57e1b2e2c29be0dfe5f9a"
+  dependencies:
+    agent-base "^2.1.1"
+    debug "^2.6.8"
+    get-uri "^2.0.0"
+    http-proxy-agent "^1.0.0"
+    https-proxy-agent "^1.0.0"
+    pac-resolver "^3.0.0"
+    raw-body "^2.2.0"
+    socks-proxy-agent "^3.0.0"
+
+pac-resolver@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/pac-resolver/-/pac-resolver-3.0.0.tgz#6aea30787db0a891704deb7800a722a7615a6f26"
+  dependencies:
+    co "^4.6.0"
+    degenerator "^1.0.4"
+    ip "^1.1.5"
+    netmask "^1.0.6"
+    thunkify "^2.1.2"
+
 package-json@^4.0.0:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/package-json/-/package-json-4.0.1.tgz#8869a0401253661c4c4ca3da6c2121ed555f5eed"
@@ -2940,6 +3124,10 @@ prebuild-install@^2.3.0:
     tunnel-agent "^0.6.0"
     xtend "4.0.1"
 
+prelude-ls@~1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.1.2.tgz#21932a549f5e52ffd9a827f570e04be62a97da54"
+
 prepend-http@^1.0.1:
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/prepend-http/-/prepend-http-1.0.4.tgz#d4f4562b0ce3696e41ac52d0e002e57a635dc6dc"
@@ -2980,6 +3168,23 @@ prompt@~0.2.14:
     utile "0.2.x"
     winston "0.8.x"
 
+proxy-agent@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/proxy-agent/-/proxy-agent-2.1.0.tgz#a3a2b3866debfeb79bb791f345dc9bc876e7ff86"
+  dependencies:
+    agent-base "2"
+    debug "2"
+    extend "3"
+    http-proxy-agent "1"
+    https-proxy-agent "1"
+    lru-cache "~2.6.5"
+    pac-proxy-agent "^2.0.0"
+    socks-proxy-agent "2"
+
+proxy-from-env@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/proxy-from-env/-/proxy-from-env-1.0.0.tgz#33c50398f70ea7eb96d21f7b817630a55791c7ee"
+
 pseudomap@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/pseudomap/-/pseudomap-1.0.2.tgz#f052a28da70e618917ef0a8ac34c1ae5a68286b3"
@@ -3031,6 +3236,15 @@ rabin-bindings@~1.7.3:
     nan "^2.7.0"
     prebuild-install "^2.3.0"
 
+raw-body@^2.2.0:
+  version "2.3.2"
+  resolved "https://registry.yarnpkg.com/raw-body/-/raw-body-2.3.2.tgz#bcd60c77d3eb93cde0050295c3f379389bc88f89"
+  dependencies:
+    bytes "3.0.0"
+    http-errors "1.6.2"
+    iconv-lite "0.4.19"
+    unpipe "1.0.0"
+
 raw-body@~2.1.5:
   version "2.1.7"
   resolved "https://registry.yarnpkg.com/raw-body/-/raw-body-2.1.7.tgz#adfeace2e4fb3098058014d08c072dcc59758774"
@@ -3096,6 +3310,27 @@ readable-stream@1.1, readable-stream@^1.1.8, readable-stream@~1.1.9:
     isarray "0.0.1"
     string_decoder "~0.10.x"
 
+readable-stream@1.1.x:
+  version "1.1.14"
+  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-1.1.14.tgz#7cf4c54ef648e3813084c636dd2079e166c081d9"
+  dependencies:
+    core-util-is "~1.0.0"
+    inherits "~2.0.1"
+    isarray "0.0.1"
+    string_decoder "~0.10.x"
+
+readable-stream@2:
+  version "2.3.3"
+  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.3.3.tgz#368f2512d79f9d46fdfc71349ae7878bbc1eb95c"
+  dependencies:
+    core-util-is "~1.0.0"
+    inherits "~2.0.3"
+    isarray "~1.0.0"
+    process-nextick-args "~1.0.6"
+    safe-buffer "~5.1.1"
+    string_decoder "~1.0.3"
+    util-deprecate "~1.0.1"
+
 readable-stream@^2.0.0, readable-stream@^2.0.1, readable-stream@^2.0.4, readable-stream@^2.0.5, readable-stream@^2.0.6, readable-stream@~2.0.0:
   version "2.0.6"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.0.6.tgz#8f90341e68a53ccc928788dacfcd11b36eb9b78e"
@@ -3263,6 +3498,10 @@ safe-buffer@^5.0.1, safe-buffer@~5.0.1:
   version "5.0.1"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.0.1.tgz#d263ca54696cd8a306b5ca6551e92de57918fbe7"
 
+safe-buffer@~5.1.0, safe-buffer@~5.1.1:
+  version "5.1.1"
+  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.1.tgz#893312af69b2123def71f57889001671eeb2c853"
+
 safe-json-stringify@~1:
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/safe-json-stringify/-/safe-json-stringify-1.0.4.tgz#81a098f447e4bbc3ff3312a243521bc060ef5911"
@@ -3307,6 +3546,10 @@ semver-diff@^2.0.0:
   version "5.4.1"
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.4.1.tgz#e059c09d8571f0540823733433505d3a2f00b18e"
 
+semver@~5.0.1:
+  version "5.0.3"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-5.0.3.tgz#77466de589cd5d3c95f138aa78bc569a3cb5d27a"
+
 semver@~5.3.0:
   version "5.3.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.3.0.tgz#9b2ce5d3de02d17c6012ad326aa6b4d0cf54f94f"
@@ -3319,6 +3562,10 @@ set-immediate-shim@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/set-immediate-shim/-/set-immediate-shim-1.0.1.tgz#4b2b1b27eb808a9f8dcc481a58e5e56f599f3f61"
 
+setprototypeof@1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/setprototypeof/-/setprototypeof-1.0.3.tgz#66567e37043eeb4f04d91bd658c0cbefb55b8e04"
+
 shebang-command@^1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/shebang-command/-/shebang-command-1.2.0.tgz#44aac65b695b03398968c39f363fee5deafdf1ea"
@@ -3359,12 +3606,38 @@ slide@^1.1.5:
   version "1.1.6"
   resolved "https://registry.yarnpkg.com/slide/-/slide-1.1.6.tgz#56eb027d65b4d2dce6cb2e2d32c4d4afc9e1d707"
 
+smart-buffer@^1.0.13:
+  version "1.1.15"
+  resolved "https://registry.yarnpkg.com/smart-buffer/-/smart-buffer-1.1.15.tgz#7f114b5b65fab3e2a35aa775bb12f0d1c649bf16"
+
 sntp@1.x.x:
   version "1.0.9"
   resolved "https://registry.yarnpkg.com/sntp/-/sntp-1.0.9.tgz#6541184cc90aeea6c6e7b35e2659082443c66198"
   dependencies:
     hoek "2.x.x"
 
+socks-proxy-agent@2:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/socks-proxy-agent/-/socks-proxy-agent-2.1.1.tgz#86ebb07193258637870e13b7bd99f26c663df3d3"
+  dependencies:
+    agent-base "2"
+    extend "3"
+    socks "~1.1.5"
+
+socks-proxy-agent@^3.0.0:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/socks-proxy-agent/-/socks-proxy-agent-3.0.1.tgz#2eae7cf8e2a82d34565761539a7f9718c5617659"
+  dependencies:
+    agent-base "^4.1.0"
+    socks "^1.1.10"
+
+socks@^1.1.10, socks@~1.1.5:
+  version "1.1.10"
+  resolved "https://registry.yarnpkg.com/socks/-/socks-1.1.10.tgz#5b8b7fc7c8f341c53ed056e929b7bf4de8ba7b5a"
+  dependencies:
+    ip "^1.1.4"
+    smart-buffer "^1.0.13"
+
 source-map-resolve@^0.3.0:
   version "0.3.1"
   resolved "https://registry.yarnpkg.com/source-map-resolve/-/source-map-resolve-0.3.1.tgz#610f6122a445b8dd51535a2a71b783dfc1248761"
@@ -3410,6 +3683,10 @@ source-map@^0.6.0:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
 
+source-map@~0.5.6:
+  version "0.5.7"
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.7.tgz#8a039d2d1021d22d1ea14c80d8ea468ba2ef3fcc"
+
 spdx-correct@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/spdx-correct/-/spdx-correct-1.0.2.tgz#4b3073d933ff51f3912f03ac5519498a4150db40"
@@ -3482,6 +3759,10 @@ statuses@1:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/statuses/-/statuses-1.3.1.tgz#faf51b9eb74aaef3b3acf4ad5f61abf24cb7b93e"
 
+"statuses@>= 1.3.1 < 2":
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/statuses/-/statuses-1.4.0.tgz#bb73d446da2796106efcc1b601a253d6c46bd087"
+
 stdout-stream@^1.4.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/stdout-stream/-/stdout-stream-1.4.0.tgz#a2c7c8587e54d9427ea9edb3ac3f2cd522df378b"
@@ -3523,6 +3804,12 @@ string_decoder@~0.10.x:
   version "0.10.31"
   resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-0.10.31.tgz#62e203bc41766c6c28c9fc84301dab1c5310fa94"
 
+string_decoder@~1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-1.0.3.tgz#0fc67d7c141825de94282dd536bec6b9bce860ab"
+  dependencies:
+    safe-buffer "~5.1.0"
+
 stringstream@~0.0.4:
   version "0.0.5"
   resolved "https://registry.yarnpkg.com/stringstream/-/stringstream-0.0.5.tgz#4e484cd4de5a0bbbee18e46307710a8a81621878"
@@ -3677,6 +3964,10 @@ through@2, through@^2.3.6:
   version "2.3.8"
   resolved "https://registry.yarnpkg.com/through/-/through-2.3.8.tgz#0dd4c9ffaabc357960b1b724115d7e0e86a2e1f5"
 
+thunkify@^2.1.2:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/thunkify/-/thunkify-2.1.2.tgz#faa0e9d230c51acc95ca13a361ac05ca7e04553d"
+
 timed-out@^4.0.0:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/timed-out/-/timed-out-4.0.1.tgz#f32eacac5a175bea25d7fab565ab3ed8741ef56f"
@@ -3760,6 +4051,12 @@ tweetnacl@^0.14.3, tweetnacl@~0.14.0:
   version "0.14.5"
   resolved "https://registry.yarnpkg.com/tweetnacl/-/tweetnacl-0.14.5.tgz#5ae68177f192d4456269d108afa93ff8743f4f64"
 
+type-check@~0.3.2:
+  version "0.3.2"
+  resolved "https://registry.yarnpkg.com/type-check/-/type-check-0.3.2.tgz#5884cab512cf1d355e3fb784f30804b2b520db72"
+  dependencies:
+    prelude-ls "~1.1.2"
+
 type-is@~1.6.10:
   version "1.6.15"
   resolved "https://registry.yarnpkg.com/type-is/-/type-is-1.6.15.tgz#cab10fb4909e441c82842eafe1ad646c81804410"
@@ -4024,6 +4321,10 @@ wordwrap@~0.0.2:
   version "0.0.3"
   resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-0.0.3.tgz#a3d5da6cd5c0bc0008d37234bbaf1bed63059107"
 
+wordwrap@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-1.0.0.tgz#27584810891456a4171c8d0226441ade90cbcaeb"
+
 wrap-ansi@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/wrap-ansi/-/wrap-ansi-2.1.0.tgz#d8fc3d284dd05794fe84973caecdd1cf824fdd85"
@@ -4087,6 +4388,10 @@ xmldom@0.1.x:
   version "0.1.27"
   resolved "https://registry.yarnpkg.com/xmldom/-/xmldom-0.1.27.tgz#d501f97b3bdb403af8ef9ecc20573187aadac0e9"
 
+xregexp@2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/xregexp/-/xregexp-2.0.0.tgz#52a63e56ca0b84a7f3a5f3d61872f126ad7a5943"
+
 xtend@4.0.1, xtend@^4.0.0:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/xtend/-/xtend-4.0.1.tgz#a5c6d532be656e23db820efb943a1f04998d63af"