diff --git a/Dockerfile b/Dockerfile
index a0290486..8f8dab69 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,6 +13,7 @@ COPY ./ ./
 RUN chown -R facilmap:facilmap .
 
 USER facilmap
+RUN npm install -g yarn@0.18.1
 RUN npm run deps && npm run clean && npm run build && node_modules/.bin/yarn add mysql pg sqlite3 tedious
 
 USER root
diff --git a/README.md b/README.md
index 8c2da48f..c58ce37e 100644
--- a/README.md
+++ b/README.md
@@ -140,7 +140,7 @@ To run the FacilMap server by hand, follow the following steps:
 As Windows does not really support running multiple commands in one npm script, instead of step 6, you have to do the
 following steps to get it running on Windows:
 
-6. Run `yarn install`
+6. Run `npm run deps`
 7. Run `npm run build`
 8. Run `npm run server`
 
diff --git a/package.json b/package.json
index 73996f3d..33242ef5 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
   },
   "scripts": {
     "start": "npm run deps && npm run build && npm run server",
-    "deps": "npm install yarn && yarn install",
+    "deps": "yarn install",
     "build": "gulp",
     "server": "node server/server.js",
     "clean": "gulp clean"
@@ -84,7 +84,6 @@
     "svgo": "^0.7.1",
     "through2": "^2.0.1",
     "url-loader": "^0.5.7",
-    "webpack": "^2.2.1",
-    "yarn": "0.18.1"
+    "webpack": "^2.2.1"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index b62d8f37..ad6d4f40 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -91,10 +91,6 @@ angular@^1.6.1:
   version "1.6.2"
   resolved "https://registry.yarnpkg.com/angular/-/angular-1.6.2.tgz#d0b677242ac4bf9ae81424297c6320973af4bb5a"
 
-ansi-escapes@^1.1.0:
-  version "1.4.0"
-  resolved "https://registry.yarnpkg.com/ansi-escapes/-/ansi-escapes-1.4.0.tgz#d3a8a83b319aa67793662b13e761c7911422306e"
-
 ansi-regex@^0.2.0, ansi-regex@^0.2.1:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-0.2.1.tgz#0d8e946967a3d8143f93e24e298525fc1b2235f9"
@@ -610,7 +606,7 @@ babel-register@^6.22.0:
     mkdirp "^0.5.1"
     source-map-support "^0.4.2"
 
-babel-runtime@^6.0.0, babel-runtime@^6.18.0, babel-runtime@^6.22.0:
+babel-runtime@^6.18.0, babel-runtime@^6.22.0:
   version "6.22.0"
   resolved "https://registry.yarnpkg.com/babel-runtime/-/babel-runtime-6.22.0.tgz#1cf8b4ac67c77a4ddb0db2ae1f74de52ac4ca611"
   dependencies:
@@ -717,12 +713,6 @@ binary@~0.3.0:
     buffers "~0.1.1"
     chainsaw "~0.1.0"
 
-bl@^1.0.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/bl/-/bl-1.2.0.tgz#1397e7ec42c5f5dc387470c500e34a9f6be9ea98"
-  dependencies:
-    readable-stream "^2.0.5"
-
 blob@0.0.4, blob@^0.0.4:
   version "0.0.4"
   resolved "https://registry.yarnpkg.com/blob/-/blob-0.0.4.tgz#bcf13052ca54463f30f9fc7e95b9a47630a94921"
@@ -887,10 +877,6 @@ bytes@2.3.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/bytes/-/bytes-2.3.0.tgz#d5b680a165b6201739acb611542aabc2d8ceb070"
 
-bytes@^2.4.0:
-  version "2.4.0"
-  resolved "https://registry.yarnpkg.com/bytes/-/bytes-2.4.0.tgz#7d97196f9d5baf7f6935e25985549edd2a6c2339"
-
 callsite@1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/callsite/-/callsite-1.0.0.tgz#280398e5d664bd74038b6f0905153e6e8af1bc20"
@@ -1007,10 +993,6 @@ chokidar@^1.4.3:
   optionalDependencies:
     fsevents "^1.0.0"
 
-ci-info@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/ci-info/-/ci-info-1.0.0.tgz#dc5285f2b4e251821683681c381c3388f46ec534"
-
 cipher-base@^1.0.0, cipher-base@^1.0.1:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/cipher-base/-/cipher-base-1.0.3.tgz#eeabf194419ce900da3018c207d212f2a6df0a07"
@@ -1029,16 +1011,6 @@ clean-css@4.0.x:
   dependencies:
     source-map "0.5.x"
 
-cli-cursor@^1.0.1:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/cli-cursor/-/cli-cursor-1.0.2.tgz#64da3f7d56a54412e59794bd62dc35295e8f2987"
-  dependencies:
-    restore-cursor "^1.0.1"
-
-cli-width@^2.0.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/cli-width/-/cli-width-2.1.0.tgz#b234ca209b29ef66fc518d9b98d5847b00edf00a"
-
 clipboard@^1.5.16:
   version "1.6.0"
   resolved "https://registry.yarnpkg.com/clipboard/-/clipboard-1.6.0.tgz#e308641d10b1d70306be881ae8997ee71bcc1534"
@@ -1075,13 +1047,6 @@ clone@^1.0.0, clone@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/clone/-/clone-1.0.2.tgz#260b7a99ebb1edfe247538175f783243cb19d149"
 
-cmd-shim@^2.0.1:
-  version "2.0.2"
-  resolved "https://registry.yarnpkg.com/cmd-shim/-/cmd-shim-2.0.2.tgz#6fcbda99483a8fd15d7d30a196ca69d688a2efdb"
-  dependencies:
-    graceful-fs "^4.1.2"
-    mkdirp "~0.5.0"
-
 co@^4.6.0:
   version "4.6.0"
   resolved "https://registry.yarnpkg.com/co/-/co-4.6.0.tgz#6ea6bdf3d853ae54ccb8e47bfa0bf3f9031fb184"
@@ -1198,14 +1163,6 @@ 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@^1.4.7, concat-stream@~1.5.1:
-  version "1.5.2"
-  resolved "https://registry.yarnpkg.com/concat-stream/-/concat-stream-1.5.2.tgz#708978624d856af41a5a741defdd261da752c266"
-  dependencies:
-    inherits "~2.0.1"
-    readable-stream "~2.0.0"
-    typedarray "~0.0.5"
-
 concat-stream@~1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/concat-stream/-/concat-stream-1.0.1.tgz#018b18bc1c7d073a2dc82aa48442341a2c4dd79f"
@@ -1218,6 +1175,14 @@ concat-stream@~1.2.1:
   dependencies:
     bops "0.0.6"
 
+concat-stream@~1.5.1:
+  version "1.5.2"
+  resolved "https://registry.yarnpkg.com/concat-stream/-/concat-stream-1.5.2.tgz#708978624d856af41a5a741defdd261da752c266"
+  dependencies:
+    inherits "~2.0.1"
+    readable-stream "~2.0.0"
+    typedarray "~0.0.5"
+
 console-browserify@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/console-browserify/-/console-browserify-1.1.0.tgz#f0241c45730a9fc6323b206dbf38edc741d0bb10"
@@ -1463,10 +1428,6 @@ dateformat@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/dateformat/-/dateformat-2.0.0.tgz#2743e3abb5c3fc2462e527dca445e04e9f4dee17"
 
-death@^1.0.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/death/-/death-1.1.0.tgz#01aa9c401edd92750514470b8266390c66c67318"
-
 debug@2.2.0, debug@~2.2.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/debug/-/debug-2.2.0.tgz#f87057e995b1a1f6ae6a4960664137bc56f039da"
@@ -1493,7 +1454,7 @@ deep-extend@~0.4.0:
   version "0.4.1"
   resolved "https://registry.yarnpkg.com/deep-extend/-/deep-extend-0.4.1.tgz#efe4113d08085f4e6f9687759810f807469e2253"
 
-defaults@^1.0.0, defaults@^1.0.3:
+defaults@^1.0.0:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/defaults/-/defaults-1.0.3.tgz#c656051e9817d9ff08ed881477f3fe4019f3ef7d"
   dependencies:
@@ -1546,10 +1507,6 @@ detect-indent@^4.0.0:
   dependencies:
     repeating "^2.0.0"
 
-diff@^2.2.1:
-  version "2.2.3"
-  resolved "https://registry.yarnpkg.com/diff/-/diff-2.2.3.tgz#60eafd0d28ee906e4e8ff0a52c1229521033bf99"
-
 diffie-hellman@^5.0.0:
   version "5.0.2"
   resolved "https://registry.yarnpkg.com/diffie-hellman/-/diffie-hellman-5.0.2.tgz#b5835739270cfe26acf632099fded2a07f209e5e"
@@ -1681,12 +1638,6 @@ encoding@^0.1.11:
   dependencies:
     iconv-lite "~0.4.13"
 
-end-of-stream@^1.0.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/end-of-stream/-/end-of-stream-1.1.0.tgz#e9353258baa9108965efc41cb0ef8ade2f3cfb07"
-  dependencies:
-    once "~1.3.0"
-
 end-of-stream@~0.1.5:
   version "0.1.5"
   resolved "https://registry.yarnpkg.com/end-of-stream/-/end-of-stream-0.1.5.tgz#8e177206c3c80837d85632e8b9359dfe8b2f6eaf"
@@ -1745,10 +1696,6 @@ entities@^1.1.1, entities@~1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/entities/-/entities-1.1.1.tgz#6e5c2d0a5621b5dadaecef80b90edfb5cd7772f0"
 
-err-code@^1.0.0:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/err-code/-/err-code-1.1.1.tgz#739d71b6851f24d050ea18c79a5b722420771d59"
-
 errno@^0.1.3:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/errno/-/errno-0.1.4.tgz#b896e23a9e5e8ba33871fc996abd3635fc9a1c7d"
@@ -1772,7 +1719,7 @@ escape-html@~1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/escape-html/-/escape-html-1.0.3.tgz#0258eae4d3d0c0974de1c169188ef0051d1d1988"
 
-escape-string-regexp@^1.0.0, escape-string-regexp@^1.0.2, escape-string-regexp@^1.0.5:
+escape-string-regexp@^1.0.0, escape-string-regexp@^1.0.2:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"
 
@@ -1814,10 +1761,6 @@ evp_bytestokey@^1.0.0:
   dependencies:
     create-hash "^1.1.1"
 
-exit-hook@^1.0.0:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/exit-hook/-/exit-hook-1.1.1.tgz#f05ca233b48c05d54fff07765df8507e95c02ff8"
-
 expand-brackets@^0.1.4:
   version "0.1.5"
   resolved "https://registry.yarnpkg.com/expand-brackets/-/expand-brackets-0.1.5.tgz#df07284e342a807cd733ac5af72411e581d1177b"
@@ -1882,14 +1825,6 @@ extend@^3.0.0, extend@~3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.0.tgz#5a474353b9f3353ddd8176dfd37b91c83a46f1d4"
 
-external-editor@^1.1.0:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/external-editor/-/external-editor-1.1.1.tgz#12d7b0db850f7ff7e7081baf4005700060c4600b"
-  dependencies:
-    extend "^3.0.0"
-    spawn-sync "^1.0.15"
-    tmp "^0.0.29"
-
 extglob@^0.3.1:
   version "0.3.2"
   resolved "https://registry.yarnpkg.com/extglob/-/extglob-0.3.2.tgz#2e18ff3d2f49ab2765cec9023f011daa8d8349a1"
@@ -1923,13 +1858,6 @@ fbjs@^0.8.1, fbjs@^0.8.4:
     setimmediate "^1.0.5"
     ua-parser-js "^0.7.9"
 
-figures@^1.3.5:
-  version "1.7.0"
-  resolved "https://registry.yarnpkg.com/figures/-/figures-1.7.0.tgz#cbe1e3affcf1cd44b80cadfed28dc793a9701d2e"
-  dependencies:
-    escape-string-regexp "^1.0.5"
-    object-assign "^4.1.0"
-
 filename-regex@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/filename-regex/-/filename-regex-2.0.0.tgz#996e3e80479b98b9897f15a8a58b3d084e926775"
@@ -2604,25 +2532,6 @@ ini@^1.3.4, ini@~1.3.0:
   version "1.3.4"
   resolved "https://registry.yarnpkg.com/ini/-/ini-1.3.4.tgz#0537cb79daf59b59a1a517dff706c86ec039162e"
 
-inquirer@^1.2.2:
-  version "1.2.3"
-  resolved "https://registry.yarnpkg.com/inquirer/-/inquirer-1.2.3.tgz#4dec6f32f37ef7bb0b2ed3f1d1a5c3f545074918"
-  dependencies:
-    ansi-escapes "^1.1.0"
-    chalk "^1.0.0"
-    cli-cursor "^1.0.1"
-    cli-width "^2.0.0"
-    external-editor "^1.1.0"
-    figures "^1.3.5"
-    lodash "^4.3.0"
-    mute-stream "0.0.6"
-    pinkie-promise "^2.0.0"
-    run-async "^2.2.0"
-    rx "^4.1.0"
-    string-width "^1.0.1"
-    strip-ansi "^3.0.0"
-    through "^2.3.6"
-
 interpret@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/interpret/-/interpret-1.0.1.tgz#d579fb7f693b858004947af39fa0db49f795602c"
@@ -2672,12 +2581,6 @@ is-builtin-module@^1.0.0:
   dependencies:
     builtin-modules "^1.0.0"
 
-is-ci@^1.0.10:
-  version "1.0.10"
-  resolved "https://registry.yarnpkg.com/is-ci/-/is-ci-1.0.10.tgz#f739336b2632365061a9d48270cd56ae3369318e"
-  dependencies:
-    ci-info "^1.0.0"
-
 is-dotfile@^1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/is-dotfile/-/is-dotfile-1.0.2.tgz#2c132383f39199f8edc268ca01b9b007d205cc4d"
@@ -2751,10 +2654,6 @@ is-primitive@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/is-primitive/-/is-primitive-2.0.0.tgz#207bab91638499c07b2adf240a41a87210034575"
 
-is-promise@^2.1.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/is-promise/-/is-promise-2.1.0.tgz#79a2a9ece7f096e80f36d2b2f3bc16c1ff4bf3fa"
-
 is-property@^1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/is-property/-/is-property-1.0.2.tgz#57fe1c4e48474edd65b09911f26b1cd4095dda84"
@@ -2969,10 +2868,6 @@ leaflet@>=0.7.0, leaflet@^0.7.3, leaflet@^1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/leaflet/-/leaflet-1.0.3.tgz#1f401b98b45c8192134c6c8d69686253805007c8"
 
-leven@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/leven/-/leven-2.0.0.tgz#74c45744439550da185801912829f61d22071bc1"
-
 liftoff@^2.1.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/liftoff/-/liftoff-2.3.0.tgz#a98f2ff67183d8ba7cfaca10548bd7ff0550b385"
@@ -3304,7 +3199,7 @@ loose-envify@^1.0.0, loose-envify@^1.1.0:
   dependencies:
     js-tokens "^3.0.0"
 
-loud-rejection@^1.0.0, loud-rejection@^1.2.0:
+loud-rejection@^1.0.0:
   version "1.6.0"
   resolved "https://registry.yarnpkg.com/loud-rejection/-/loud-rejection-1.6.0.tgz#5b46f80147edee578870f086d04821cf998e551f"
   dependencies:
@@ -3431,7 +3326,7 @@ minimalistic-assert@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/minimalistic-assert/-/minimalistic-assert-1.0.0.tgz#702be2dda6b37f4836bcb3f5db56641b64a1d3d3"
 
-"minimatch@2 || 3", minimatch@^3.0.0, minimatch@^3.0.2, minimatch@^3.0.3:
+"minimatch@2 || 3", minimatch@^3.0.0, minimatch@^3.0.2:
   version "3.0.3"
   resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.3.tgz#2a4e4090b96b2db06a9d7df01055a62a77c9b774"
   dependencies:
@@ -3496,10 +3391,6 @@ multipipe@^0.1.0, multipipe@^0.1.2:
   dependencies:
     duplexer2 "0.0.2"
 
-mute-stream@0.0.6, mute-stream@~0.0.4:
-  version "0.0.6"
-  resolved "https://registry.yarnpkg.com/mute-stream/-/mute-stream-0.0.6.tgz#48962b19e169fd1dfc240b3f1e7317627bbc47db"
-
 mysql@^2.13.0:
   version "2.13.0"
   resolved "https://registry.yarnpkg.com/mysql/-/mysql-2.13.0.tgz#998f1f8ca46e2e3dd7149ce982413653986aae47"
@@ -3562,12 +3453,6 @@ node-dir@^0.1.10:
   dependencies:
     minimatch "^3.0.2"
 
-node-emoji@^1.0.4:
-  version "1.5.1"
-  resolved "https://registry.yarnpkg.com/node-emoji/-/node-emoji-1.5.1.tgz#fd918e412769bf8c448051238233840b2aff16a1"
-  dependencies:
-    string.prototype.codepointat "^0.2.0"
-
 node-fetch@^1.0.1:
   version "1.6.3"
   resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-1.6.3.tgz#dc234edd6489982d58e8f0db4f695029abcd8c04"
@@ -3575,24 +3460,6 @@ node-fetch@^1.0.1:
     encoding "^0.1.11"
     is-stream "^1.0.1"
 
-node-gyp@^3.2.1:
-  version "3.5.0"
-  resolved "https://registry.yarnpkg.com/node-gyp/-/node-gyp-3.5.0.tgz#a8fe5e611d079ec16348a3eb960e78e11c85274a"
-  dependencies:
-    fstream "^1.0.0"
-    glob "^7.0.3"
-    graceful-fs "^4.1.2"
-    minimatch "^3.0.2"
-    mkdirp "^0.5.0"
-    nopt "2 || 3"
-    npmlog "0 || 1 || 2 || 3 || 4"
-    osenv "0"
-    request "2"
-    rimraf "2"
-    semver "2.x || 3.x || 4 || 5"
-    tar "^2.0.0"
-    which "1"
-
 node-libs-browser@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/node-libs-browser/-/node-libs-browser-2.0.0.tgz#a3a59ec97024985b46e958379646f96c4b616646"
@@ -3635,7 +3502,7 @@ node-pre-gyp@^0.6.29:
     tar "~2.2.1"
     tar-pack "~3.3.0"
 
-"nopt@2 || 3", nopt@~3.0.6:
+nopt@~3.0.6:
   version "3.0.6"
   resolved "https://registry.yarnpkg.com/nopt/-/nopt-3.0.6.tgz#c6465dbf08abcd4db359317f79ac68a646b28ff9"
   dependencies:
@@ -3667,7 +3534,7 @@ normalize-url@^1.4.0:
     query-string "^4.1.0"
     sort-keys "^1.0.0"
 
-"npmlog@0 || 1 || 2 || 3 || 4", npmlog@^4.0.1:
+npmlog@^4.0.1:
   version "4.0.2"
   resolved "https://registry.yarnpkg.com/npmlog/-/npmlog-4.0.2.tgz#d03950e0e78ce1527ba26d2a7592e9348ac3e75f"
   dependencies:
@@ -3710,10 +3577,6 @@ object-keys@~0.4.0:
   version "0.4.0"
   resolved "https://registry.yarnpkg.com/object-keys/-/object-keys-0.4.0.tgz#28a6aae7428dd2c3a92f3d95f21335dd204e0336"
 
-object-path@^0.11.2:
-  version "0.11.3"
-  resolved "https://registry.yarnpkg.com/object-path/-/object-path-0.11.3.tgz#3e21a42ad07234d815429ae9e15c1c5f38050554"
-
 object.omit@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/object.omit/-/object.omit-2.0.1.tgz#1a9c744829f39dbb858c76ca3579ae2a54ebd1fa"
@@ -3743,10 +3606,6 @@ once@~1.3.0, once@~1.3.3:
   dependencies:
     wrappy "1"
 
-onetime@^1.0.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/onetime/-/onetime-1.1.0.tgz#a1f7838f8314c516f05ecefcbc4ccfe04b4ed789"
-
 optimist@~0.3.5:
   version "0.3.7"
   resolved "https://registry.yarnpkg.com/optimist/-/optimist-0.3.7.tgz#c90941ad59e4273328923074d2cf2e7cbc6ec0d9"
@@ -3800,21 +3659,10 @@ os-locale@^1.4.0:
   dependencies:
     lcid "^1.0.0"
 
-os-shim@^0.1.2:
-  version "0.1.3"
-  resolved "https://registry.yarnpkg.com/os-shim/-/os-shim-0.1.3.tgz#6b62c3791cf7909ea35ed46e17658bb417cb3917"
-
-os-tmpdir@^1.0.0, os-tmpdir@^1.0.1, os-tmpdir@~1.0.1:
+os-tmpdir@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/os-tmpdir/-/os-tmpdir-1.0.2.tgz#bbe67406c79aa85c5cfec766fe5734555dfa1274"
 
-osenv@0:
-  version "0.1.4"
-  resolved "https://registry.yarnpkg.com/osenv/-/osenv-0.1.4.tgz#42fe6d5953df06c8064be6f176c3d05aaaa34644"
-  dependencies:
-    os-homedir "^1.0.0"
-    os-tmpdir "^1.0.0"
-
 osm-polygon-features@^0.9.1:
   version "0.9.2"
   resolved "https://registry.yarnpkg.com/osm-polygon-features/-/osm-polygon-features-0.9.2.tgz#20ae41130c486e49a3b2a3c2b58a1419c4986778"
@@ -4244,15 +4092,6 @@ promise@^7.1.1:
   dependencies:
     asap "~2.0.3"
 
-proper-lockfile@^1.1.3:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/proper-lockfile/-/proper-lockfile-1.2.0.tgz#ceff5dd89d3e5f10fb75e1e8e76bc75801a59c34"
-  dependencies:
-    err-code "^1.0.0"
-    extend "^3.0.0"
-    graceful-fs "^4.1.2"
-    retry "^0.10.0"
-
 proxy-addr@~1.1.3:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/proxy-addr/-/proxy-addr-1.1.3.tgz#dc97502f5722e888467b3fa2297a7b1ff47df074"
@@ -4368,12 +4207,6 @@ read-pkg@^1.0.0:
     normalize-package-data "^2.3.2"
     path-type "^1.0.0"
 
-read@^1.0.7:
-  version "1.0.7"
-  resolved "https://registry.yarnpkg.com/read/-/read-1.0.7.tgz#b3da19bd052431a97671d44a42634adf710b40c4"
-  dependencies:
-    mute-stream "~0.0.4"
-
 readable-stream@1.0, "readable-stream@>=1.0.33-1 <1.1.0-0", readable-stream@~1.0.17:
   version "1.0.34"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-1.0.34.tgz#125820e34bc842d2f2aaafafe4c2916ee32c157c"
@@ -4392,9 +4225,9 @@ readable-stream@1.1, readable-stream@1.1.14, readable-stream@~1.1.9:
     isarray "0.0.1"
     string_decoder "~0.10.x"
 
-readable-stream@^2.0.0, "readable-stream@^2.0.0 || ^1.1.13", readable-stream@^2.0.1, readable-stream@^2.0.2, readable-stream@^2.0.5, readable-stream@^2.1.0, readable-stream@^2.1.5:
-  version "2.2.2"
-  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.2.2.tgz#a9e6fec3c7dda85f8bb1b3ba7028604556fc825e"
+"readable-stream@^2.0.0 || ^1.1.13", readable-stream@^2.0.1, readable-stream@^2.0.2, readable-stream@^2.0.5, readable-stream@^2.1.0, readable-stream@^2.1.5, readable-stream@~2.1.4, readable-stream@~2.1.5:
+  version "2.1.5"
+  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.1.5.tgz#66fa8b720e1438b364681f2ad1a63c618448c9d0"
   dependencies:
     buffer-shims "^1.0.0"
     core-util-is "~1.0.0"
@@ -4415,18 +4248,6 @@ readable-stream@~2.0.0:
     string_decoder "~0.10.x"
     util-deprecate "~1.0.1"
 
-readable-stream@~2.1.4, readable-stream@~2.1.5:
-  version "2.1.5"
-  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.1.5.tgz#66fa8b720e1438b364681f2ad1a63c618448c9d0"
-  dependencies:
-    buffer-shims "^1.0.0"
-    core-util-is "~1.0.0"
-    inherits "~2.0.1"
-    isarray "~1.0.0"
-    process-nextick-args "~1.0.6"
-    string_decoder "~0.10.x"
-    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"
@@ -4553,10 +4374,6 @@ replace-ext@0.0.1:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/replace-ext/-/replace-ext-0.0.1.tgz#29bbd92078a739f0bcce2b4ee41e837953522924"
 
-request-capture-har@^1.1.4:
-  version "1.1.4"
-  resolved "https://registry.yarnpkg.com/request-capture-har/-/request-capture-har-1.1.4.tgz#e6ad76eb8e7a1714553fdbeef32cd4518e4e2013"
-
 request-promise-core@1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/request-promise-core/-/request-promise-core-1.1.1.tgz#3eee00b2c5aa83239cfb04c5700da36f81cd08b6"
@@ -4571,7 +4388,7 @@ request-promise@^4.1.1:
     request-promise-core "1.1.1"
     stealthy-require "^1.0.0"
 
-request@2, request@^2.75.0, request@^2.79.0:
+request@^2.75.0, request@^2.79.0:
   version "2.79.0"
   resolved "https://registry.yarnpkg.com/request/-/request-2.79.0.tgz#4dfe5bf6be8b8cdc37fcf93e04b65577722710de"
   dependencies:
@@ -4615,13 +4432,6 @@ resolve@^1.1.6, resolve@^1.1.7:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.2.0.tgz#9589c3f2f6149d1417a40becc1663db6ec6bc26c"
 
-restore-cursor@^1.0.1:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/restore-cursor/-/restore-cursor-1.0.1.tgz#34661f46886327fed2991479152252df92daa541"
-  dependencies:
-    exit-hook "^1.0.0"
-    onetime "^1.0.0"
-
 retry-as-promised@^2.0.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/retry-as-promised/-/retry-as-promised-2.2.0.tgz#b0463d7fd3cf5b2fed64500ab6e8b8a49c5b8e6c"
@@ -4630,17 +4440,13 @@ retry-as-promised@^2.0.0:
     cross-env "^3.1.2"
     debug "^2.2.0"
 
-retry@^0.10.0:
-  version "0.10.1"
-  resolved "https://registry.yarnpkg.com/retry/-/retry-0.10.1.tgz#e76388d217992c252750241d3d3956fed98d8ff4"
-
 right-align@^0.1.1:
   version "0.1.3"
   resolved "https://registry.yarnpkg.com/right-align/-/right-align-0.1.3.tgz#61339b722fe6a3515689210d24e14c96148613ef"
   dependencies:
     align-text "^0.1.1"
 
-rimraf@2, rimraf@^2.2.8, rimraf@^2.5.0, rimraf@~2.5.1, rimraf@~2.5.4:
+rimraf@2, rimraf@^2.2.8, rimraf@~2.5.1, rimraf@~2.5.4:
   version "2.5.4"
   resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.5.4.tgz#96800093cbf1a0c86bd95b4625467535c29dfa04"
   dependencies:
@@ -4650,20 +4456,6 @@ ripemd160@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/ripemd160/-/ripemd160-1.0.1.tgz#93a4bbd4942bc574b69a8fa57c71de10ecca7d6e"
 
-roadrunner@^1.1.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/roadrunner/-/roadrunner-1.1.0.tgz#1180a30d64e1970d8f55dd8cb0da8ffccecad71e"
-
-run-async@^2.2.0:
-  version "2.3.0"
-  resolved "https://registry.yarnpkg.com/run-async/-/run-async-2.3.0.tgz#0371ab4ae0bdd720d4166d7dfda64ff7a445a6c0"
-  dependencies:
-    is-promise "^2.1.0"
-
-rx@^4.1.0:
-  version "4.1.0"
-  resolved "https://registry.yarnpkg.com/rx/-/rx-4.1.0.tgz#a5f13ff79ef3b740fe30aa803fb09f98805d4782"
-
 sax@~1.2.1:
   version "1.2.2"
   resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.2.tgz#fd8631a23bc7826bef5d871bdb87378c95647828"
@@ -4672,7 +4464,7 @@ select@^1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/select/-/select-1.1.2.tgz#0e7350acdec80b1108528786ec1d4418d11b396d"
 
-"semver@2 || 3 || 4 || 5", "semver@2.x || 3.x || 4 || 5", semver@^5.0.1, semver@^5.1.0, semver@~5.3.0:
+"semver@2 || 3 || 4 || 5", semver@^5.0.1, semver@~5.3.0:
   version "5.3.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.3.0.tgz#9b2ce5d3de02d17c6012ad326aa6b4d0cf54f94f"
 
@@ -4864,13 +4656,6 @@ sparkles@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/sparkles/-/sparkles-1.0.0.tgz#1acbbfb592436d10bbe8f785b7cc6f82815012c3"
 
-spawn-sync@^1.0.15:
-  version "1.0.15"
-  resolved "https://registry.yarnpkg.com/spawn-sync/-/spawn-sync-1.0.15.tgz#b00799557eb7fb0c8376c29d44e8a1ea67e57476"
-  dependencies:
-    concat-stream "^1.4.7"
-    os-shim "^0.1.2"
-
 spdx-correct@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/spdx-correct/-/spdx-correct-1.0.2.tgz#4b3073d933ff51f3912f03ac5519498a4150db40"
@@ -4979,10 +4764,6 @@ string-width@^1.0.1, string-width@^1.0.2:
     is-fullwidth-code-point "^1.0.0"
     strip-ansi "^3.0.0"
 
-string.prototype.codepointat@^0.2.0:
-  version "0.2.0"
-  resolved "https://registry.yarnpkg.com/string.prototype.codepointat/-/string.prototype.codepointat-0.2.0.tgz#6b26e9bd3afcaa7be3b4269b526de1b82000ac78"
-
 string_decoder@^0.10.25, string_decoder@~0.10.x:
   version "0.10.31"
   resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-0.10.31.tgz#62e203bc41766c6c28c9fc84301dab1c5310fa94"
@@ -5083,16 +4864,7 @@ tar-pack@~3.3.0:
     tar "~2.2.1"
     uid-number "~0.0.6"
 
-tar-stream@^1.5.2:
-  version "1.5.2"
-  resolved "https://registry.yarnpkg.com/tar-stream/-/tar-stream-1.5.2.tgz#fbc6c6e83c1a19d4cb48c7d96171fc248effc7bf"
-  dependencies:
-    bl "^1.0.0"
-    end-of-stream "^1.0.0"
-    readable-stream "^2.0.0"
-    xtend "^4.0.0"
-
-tar@^2.0.0, tar@^2.2.1, tar@~2.2.1:
+tar@~2.2.1:
   version "2.2.1"
   resolved "https://registry.yarnpkg.com/tar/-/tar-2.2.1.tgz#8e4d2a256c0e2185c6b18ad694aec968b83cb1d1"
   dependencies:
@@ -5138,7 +4910,7 @@ through2@^2.0.0, through2@^2.0.1:
     readable-stream "^2.1.5"
     xtend "~4.0.1"
 
-through@2, through@^2.3.6, through@~2.3, through@~2.3.1, through@~2.3.4, through@~2.3.6:
+through@2, through@~2.3, through@~2.3.1, through@~2.3.4, through@~2.3.6:
   version "2.3.8"
   resolved "https://registry.yarnpkg.com/through/-/through-2.3.8.tgz#0dd4c9ffaabc357960b1b724115d7e0e86a2e1f5"
 
@@ -5166,12 +4938,6 @@ tiny-emitter@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/tiny-emitter/-/tiny-emitter-1.1.0.tgz#ab405a21ffed814a76c19739648093d70654fecb"
 
-tmp@^0.0.29:
-  version "0.0.29"
-  resolved "https://registry.yarnpkg.com/tmp/-/tmp-0.0.29.tgz#f25125ff0dd9da3ccb0c2dd371ee1288bb9128c0"
-  dependencies:
-    os-tmpdir "~1.0.1"
-
 to-array@0.1.4:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/to-array/-/to-array-0.1.4.tgz#17e6c11f73dd4f3d74cda7a4ff3238e9ad9bf890"
@@ -5328,12 +5094,6 @@ user-home@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/user-home/-/user-home-1.1.1.tgz#2b5be23a32b63a7c9deb8d0f28d485724a3df190"
 
-user-home@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/user-home/-/user-home-2.0.0.tgz#9c70bfd8169bc1dcbf48604e0f04b8b49cde9e9f"
-  dependencies:
-    os-homedir "^1.0.0"
-
 util-deprecate@~1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"
@@ -5503,7 +5263,7 @@ which-module@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/which-module/-/which-module-1.0.0.tgz#bba63ca861948994ff307736089e3b96026c2a4f"
 
-which@1, which@^1.2.12, which@^1.2.9:
+which@^1.2.12, which@^1.2.9:
   version "1.2.12"
   resolved "https://registry.yarnpkg.com/which/-/which-1.2.12.tgz#de67b5e450269f194909ef23ece4ebe416fa1192"
   dependencies:
@@ -5620,47 +5380,6 @@ yargs@~3.10.0:
     decamelize "^1.0.0"
     window-size "0.1.0"
 
-yarn@0.18.1:
-  version "0.18.1"
-  resolved "https://registry.yarnpkg.com/yarn/-/yarn-0.18.1.tgz#02e2efee30255a60b6df4b5b2c7da9c1fd4c8e83"
-  dependencies:
-    babel-runtime "^6.0.0"
-    bytes "^2.4.0"
-    camelcase "^3.0.0"
-    chalk "^1.1.1"
-    cmd-shim "^2.0.1"
-    commander "^2.9.0"
-    death "^1.0.0"
-    debug "^2.2.0"
-    defaults "^1.0.3"
-    detect-indent "^4.0.0"
-    diff "^2.2.1"
-    ini "^1.3.4"
-    inquirer "^1.2.2"
-    invariant "^2.2.0"
-    is-builtin-module "^1.0.0"
-    is-ci "^1.0.10"
-    leven "^2.0.0"
-    loud-rejection "^1.2.0"
-    minimatch "^3.0.3"
-    mkdirp "^0.5.1"
-    node-emoji "^1.0.4"
-    node-gyp "^3.2.1"
-    object-path "^0.11.2"
-    proper-lockfile "^1.1.3"
-    read "^1.0.7"
-    repeating "^2.0.0"
-    request "^2.75.0"
-    request-capture-har "^1.1.4"
-    rimraf "^2.5.0"
-    roadrunner "^1.1.0"
-    semver "^5.1.0"
-    strip-bom "^2.0.0"
-    tar "^2.2.1"
-    tar-stream "^1.5.2"
-    user-home "^2.0.0"
-    validate-npm-package-license "^3.0.1"
-
 yeast@0.1.2:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/yeast/-/yeast-0.1.2.tgz#008e06d8094320c372dbc2f8ed76a0ca6c8ac419"