diff --git a/www/package.json b/www/package.json
index 1cfe0a7ab2..4a6f1850c0 100644
--- a/www/package.json
+++ b/www/package.json
@@ -85,7 +85,7 @@
     "sass-loader": "6.0.7",
     "script-ext-html-webpack-plugin": "1.8.8",
     "style-loader": "0.20.3",
-    "stylelint": "^8.4.0",
+    "stylelint": "^9.1.3",
     "stylelint-config-standard": "18.2.0",
     "stylelint-order": "0.8.1",
     "stylelint-webpack-plugin": "0.10.3",
diff --git a/www/yarn.lock b/www/yarn.lock
index dfbcac8225..d8f947d622 100644
--- a/www/yarn.lock
+++ b/www/yarn.lock
@@ -471,7 +471,7 @@ autodll-webpack-plugin@0.3.9:
     webpack-merge "^4.1.0"
     webpack-sources "^1.0.1"
 
-autoprefixer@8.2.0:
+autoprefixer@8.2.0, autoprefixer@^8.0.0:
   version "8.2.0"
   resolved "https://registry.yarnpkg.com/autoprefixer/-/autoprefixer-8.2.0.tgz#1e49b611b31a5259b86b7a6b2b1b8faf091abe2a"
   dependencies:
@@ -493,17 +493,6 @@ autoprefixer@^6.3.1:
     postcss "^5.2.16"
     postcss-value-parser "^3.2.3"
 
-autoprefixer@^7.1.2:
-  version "7.2.5"
-  resolved "https://registry.yarnpkg.com/autoprefixer/-/autoprefixer-7.2.5.tgz#04ccbd0c6a61131b6d13f53d371926092952d192"
-  dependencies:
-    browserslist "^2.11.1"
-    caniuse-lite "^1.0.30000791"
-    normalize-range "^0.1.2"
-    num2fraction "^1.2.2"
-    postcss "^6.0.16"
-    postcss-value-parser "^3.2.3"
-
 autotrack@2.4.1:
   version "2.4.1"
   resolved "https://registry.yarnpkg.com/autotrack/-/autotrack-2.4.1.tgz#ccbf010e3d95ef23c8dd6db4e8df025135c82ee6"
@@ -1463,7 +1452,7 @@ browserslist@^1.3.6, browserslist@^1.5.2, browserslist@^1.7.6:
     caniuse-db "^1.0.30000639"
     electron-to-chromium "^1.2.7"
 
-browserslist@^2.1.2, browserslist@^2.11.1:
+browserslist@^2.1.2:
   version "2.11.3"
   resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-2.11.3.tgz#fe36167aed1bbcde4827ebfe71347a2cc70b99b2"
   dependencies:
@@ -1617,7 +1606,7 @@ caniuse-db@^1.0.30000529, caniuse-db@^1.0.30000634, caniuse-db@^1.0.30000639:
   version "1.0.30000794"
   resolved "https://registry.yarnpkg.com/caniuse-db/-/caniuse-db-1.0.30000794.tgz#bbe71104fa277ce4b362387d54905e8b88e52f35"
 
-caniuse-lite@^1.0.30000791, caniuse-lite@^1.0.30000792:
+caniuse-lite@^1.0.30000792:
   version "1.0.30000812"
   resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30000812.tgz#d173b686b49bc941fa18ff2e7e533048e20ed92c"
 
@@ -2068,13 +2057,13 @@ cosmiconfig@^2.1.0, cosmiconfig@^2.1.1:
     parse-json "^2.2.0"
     require-from-string "^1.1.0"
 
-cosmiconfig@^3.1.0:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/cosmiconfig/-/cosmiconfig-3.1.0.tgz#640a94bf9847f321800403cd273af60665c73397"
+cosmiconfig@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/cosmiconfig/-/cosmiconfig-4.0.0.tgz#760391549580bbd2df1e562bc177b13c290972dc"
   dependencies:
     is-directory "^0.3.1"
     js-yaml "^3.9.0"
-    parse-json "^3.0.0"
+    parse-json "^4.0.0"
     require-from-string "^2.0.1"
 
 coveralls@3.0.0:
@@ -3723,7 +3712,7 @@ globule@^1.0.0:
     lodash "~4.17.4"
     minimatch "~3.0.2"
 
-gonzales-pe@^4.0.3:
+gonzales-pe@^4.2.3:
   version "4.2.3"
   resolved "https://registry.yarnpkg.com/gonzales-pe/-/gonzales-pe-4.2.3.tgz#41091703625433285e0aee3aa47829fc1fbeb6f2"
   dependencies:
@@ -5118,9 +5107,9 @@ kind-of@^6.0.0, kind-of@^6.0.2:
   version "6.0.2"
   resolved "https://registry.yarnpkg.com/kind-of/-/kind-of-6.0.2.tgz#01146b36a6218e64e58f3a8d66de5d7fc6f6d051"
 
-known-css-properties@^0.5.0:
-  version "0.5.0"
-  resolved "https://registry.yarnpkg.com/known-css-properties/-/known-css-properties-0.5.0.tgz#6ff66943ed4a5b55657ee095779a91f4536f8084"
+known-css-properties@^0.6.0:
+  version "0.6.1"
+  resolved "https://registry.yarnpkg.com/known-css-properties/-/known-css-properties-0.6.1.tgz#31b5123ad03d8d1a3f36bd4155459c981173478b"
 
 last-call-webpack-plugin@^2.1.2:
   version "2.1.2"
@@ -6197,7 +6186,7 @@ parse-asn1@^5.0.0:
     evp_bytestokey "^1.0.0"
     pbkdf2 "^3.0.3"
 
-parse-entities@^1.0.2:
+parse-entities@^1.0.2, parse-entities@^1.1.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/parse-entities/-/parse-entities-1.1.1.tgz#8112d88471319f27abae4d64964b122fe4e1b890"
   dependencies:
@@ -6223,12 +6212,6 @@ parse-json@^2.2.0:
   dependencies:
     error-ex "^1.2.0"
 
-parse-json@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/parse-json/-/parse-json-3.0.0.tgz#fa6f47b18e23826ead32f263e744d0e1e847fb13"
-  dependencies:
-    error-ex "^1.3.1"
-
 parse-json@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/parse-json/-/parse-json-4.0.0.tgz#be35f5425be1f7f6c747184f98a788cb99477ee0"
@@ -6458,12 +6441,12 @@ postcss-filter-plugins@^2.0.0:
     postcss "^5.0.4"
     uniqid "^4.0.0"
 
-postcss-html@^0.12.0:
-  version "0.12.0"
-  resolved "https://registry.yarnpkg.com/postcss-html/-/postcss-html-0.12.0.tgz#39b6adb4005dfc5464df7999c0f81c95bced7e50"
+postcss-html@^0.15.0:
+  version "0.15.0"
+  resolved "https://registry.yarnpkg.com/postcss-html/-/postcss-html-0.15.0.tgz#11ba3c07c817d0816f091fe40817a8ecd861300f"
   dependencies:
     htmlparser2 "^3.9.2"
-    remark "^8.0.0"
+    remark "^9.0.0"
     unist-util-find-all-after "^1.0.1"
 
 postcss-less@^1.1.0:
@@ -6658,12 +6641,12 @@ postcss-safe-parser@^3.0.1:
   dependencies:
     postcss "^6.0.6"
 
-postcss-sass@^0.2.0:
-  version "0.2.0"
-  resolved "https://registry.yarnpkg.com/postcss-sass/-/postcss-sass-0.2.0.tgz#e55516441e9526ba4b380a730d3a02e9eaa78c7a"
+postcss-sass@^0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/postcss-sass/-/postcss-sass-0.3.0.tgz#dc2582ee0e61541aa88bafdc5a8aebb53deaae75"
   dependencies:
-    gonzales-pe "^4.0.3"
-    postcss "^6.0.6"
+    gonzales-pe "^4.2.3"
+    postcss "^6.0.16"
 
 postcss-scss@^1.0.2:
   version "1.0.3"
@@ -7354,9 +7337,9 @@ relateurl@0.2.x:
   version "0.2.7"
   resolved "https://registry.yarnpkg.com/relateurl/-/relateurl-0.2.7.tgz#54dbf377e51440aca90a4cd274600d3ff2d888a9"
 
-remark-parse@^4.0.0:
-  version "4.0.0"
-  resolved "https://registry.yarnpkg.com/remark-parse/-/remark-parse-4.0.0.tgz#99f1f049afac80382366e2e0d0bd55429dd45d8b"
+remark-parse@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/remark-parse/-/remark-parse-5.0.0.tgz#4c077f9e499044d1d5c13f80d7a98cf7b9285d95"
   dependencies:
     collapse-white-space "^1.0.2"
     is-alphabetical "^1.0.0"
@@ -7364,7 +7347,7 @@ remark-parse@^4.0.0:
     is-whitespace-character "^1.0.0"
     is-word-character "^1.0.0"
     markdown-escapes "^1.0.0"
-    parse-entities "^1.0.2"
+    parse-entities "^1.1.0"
     repeat-string "^1.5.4"
     state-toggle "^1.0.0"
     trim "0.0.1"
@@ -7374,9 +7357,9 @@ remark-parse@^4.0.0:
     vfile-location "^2.0.0"
     xtend "^4.0.1"
 
-remark-stringify@^4.0.0:
-  version "4.0.0"
-  resolved "https://registry.yarnpkg.com/remark-stringify/-/remark-stringify-4.0.0.tgz#4431884c0418f112da44991b4e356cfe37facd87"
+remark-stringify@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/remark-stringify/-/remark-stringify-5.0.0.tgz#336d3a4d4a6a3390d933eeba62e8de4bd280afba"
   dependencies:
     ccount "^1.0.0"
     is-alphanumeric "^1.0.0"
@@ -7393,12 +7376,12 @@ remark-stringify@^4.0.0:
     unherit "^1.0.4"
     xtend "^4.0.1"
 
-remark@^8.0.0:
-  version "8.0.0"
-  resolved "https://registry.yarnpkg.com/remark/-/remark-8.0.0.tgz#287b6df2fe1190e263c1d15e486d3fa835594d6d"
+remark@^9.0.0:
+  version "9.0.0"
+  resolved "https://registry.yarnpkg.com/remark/-/remark-9.0.0.tgz#c5cfa8ec535c73a67c4b0f12bfdbd3a67d8b2f60"
   dependencies:
-    remark-parse "^4.0.0"
-    remark-stringify "^4.0.0"
+    remark-parse "^5.0.0"
+    remark-stringify "^5.0.0"
     unified "^6.0.0"
 
 remove-trailing-separator@^1.0.1:
@@ -8279,14 +8262,14 @@ stylelint-webpack-plugin@0.10.3:
     object-assign "^4.1.0"
     ramda "^0.25.0"
 
-stylelint@^8.4.0:
-  version "8.4.0"
-  resolved "https://registry.yarnpkg.com/stylelint/-/stylelint-8.4.0.tgz#c2dbaeb17236917819f9206e1c0df5fddf6f83c3"
+stylelint@^9.1.3:
+  version "9.1.3"
+  resolved "https://registry.yarnpkg.com/stylelint/-/stylelint-9.1.3.tgz#8260f2a221b98e4afafd9b2b8a785d2e38cbb8a4"
   dependencies:
-    autoprefixer "^7.1.2"
+    autoprefixer "^8.0.0"
     balanced-match "^1.0.0"
     chalk "^2.0.1"
-    cosmiconfig "^3.1.0"
+    cosmiconfig "^4.0.0"
     debug "^3.0.0"
     execall "^1.0.0"
     file-entry-cache "^2.0.0"
@@ -8296,7 +8279,7 @@ stylelint@^8.4.0:
     html-tags "^2.0.0"
     ignore "^3.3.3"
     imurmurhash "^0.1.4"
-    known-css-properties "^0.5.0"
+    known-css-properties "^0.6.0"
     lodash "^4.17.4"
     log-symbols "^2.0.0"
     mathml-tag-names "^2.0.1"
@@ -8304,18 +8287,19 @@ stylelint@^8.4.0:
     micromatch "^2.3.11"
     normalize-selector "^0.2.0"
     pify "^3.0.0"
-    postcss "^6.0.6"
-    postcss-html "^0.12.0"
+    postcss "^6.0.16"
+    postcss-html "^0.15.0"
     postcss-less "^1.1.0"
     postcss-media-query-parser "^0.2.3"
     postcss-reporter "^5.0.0"
     postcss-resolve-nested-selector "^0.1.1"
     postcss-safe-parser "^3.0.1"
-    postcss-sass "^0.2.0"
+    postcss-sass "^0.3.0"
     postcss-scss "^1.0.2"
     postcss-selector-parser "^3.1.0"
     postcss-value-parser "^3.3.0"
     resolve-from "^4.0.0"
+    signal-exit "^3.0.2"
     specificity "^0.3.1"
     string-width "^2.1.0"
     style-search "^0.1.0"