diff --git a/package.json b/package.json
index 45bec4cd3a..9270e069cf 100644
--- a/package.json
+++ b/package.json
@@ -142,7 +142,7 @@
     "sqlite3": "4.2.0"
   },
   "devDependencies": {
-    "@lodder/grunt-postcss": "2.0.4",
+    "@lodder/grunt-postcss": "3.0.0",
     "coffeescript": "2.5.1",
     "cssnano": "4.1.10",
     "eslint": "7.11.0",
diff --git a/yarn.lock b/yarn.lock
index dcf63b2db7..7e632bc32d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -60,14 +60,13 @@
     minimatch "^3.0.4"
     strip-json-comments "^3.1.1"
 
-"@lodder/grunt-postcss@2.0.4":
-  version "2.0.4"
-  resolved "https://registry.yarnpkg.com/@lodder/grunt-postcss/-/grunt-postcss-2.0.4.tgz#f77082d4ddbda1ff6a3f8978a752e9ad7ad199ce"
-  integrity sha512-WMVsePTvaSpg7gyQO97d+YjJcv6t+mrvXQL8qvReN3JqugH3yM8JoPyYxY1yl6B/xnlZJ7bX4WLtv4U1MQkQyw==
+"@lodder/grunt-postcss@3.0.0":
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/@lodder/grunt-postcss/-/grunt-postcss-3.0.0.tgz#815d72e9d731e8ed70cc89b948452f4f1740d1a1"
+  integrity sha512-oM/ATfKcc89yFz+6GZXmWBUMDD09Q7P566kcwDqLbUGgnO2qlgPLEQXN2VagDLqZsOS8wsozpJWFjbsUQz9h3w==
   dependencies:
     diff "^4.0.2"
-    maxmin "^2.1.0"
-    postcss "^7.0.31"
+    maxmin "^3.0.0"
 
 "@metascraper/helpers@^5.11.9":
   version "5.12.19"
@@ -3461,7 +3460,7 @@ figures@^1.0.1:
     escape-string-regexp "^1.0.5"
     object-assign "^4.1.0"
 
-figures@^3.0.0:
+figures@^3.0.0, figures@^3.2.0:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/figures/-/figures-3.2.0.tgz#625c18bd293c604dc4a8ddb2febf0c88341746af"
   integrity sha512-yaduQFRKLXYOGgEn6AZau90j3ggSOyiqXU0F9JZfeXYhNa+Jk4X+s45A2zg5jns87GAFa34BBm2kXw4XpNcbdg==
@@ -4257,6 +4256,14 @@ gzip-size@^3.0.0:
   dependencies:
     duplexer "^0.1.1"
 
+gzip-size@^5.1.1:
+  version "5.1.1"
+  resolved "https://registry.yarnpkg.com/gzip-size/-/gzip-size-5.1.1.tgz#cb9bee692f87c0612b232840a873904e4c135274"
+  integrity sha512-FNHi6mmoHvs1mxZAds4PpdCS6QG8B4C1krxJsMutgxl5t3+GlRTzzI3NEkifXx2pVsOvJdOGSmIgDhQ55FwdPA==
+  dependencies:
+    duplexer "^0.1.1"
+    pify "^4.0.1"
+
 handlebars@4.7.6, handlebars@^4.7.6:
   version "4.7.6"
   resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.7.6.tgz#d4c05c1baf90e9945f77aa68a7a219aa4a7df74e"
@@ -5872,6 +5879,16 @@ maxmin@^2.1.0:
     gzip-size "^3.0.0"
     pretty-bytes "^3.0.0"
 
+maxmin@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/maxmin/-/maxmin-3.0.0.tgz#3ee9acc8a2b9f2b5416e94f5705319df8a9c71e6"
+  integrity sha512-wcahMInmGtg/7c6a75fr21Ch/Ks1Tb+Jtoan5Ft4bAI0ZvJqyOw8kkM7e7p8hDSzY805vmxwHT50KcjGwKyJ0g==
+  dependencies:
+    chalk "^4.1.0"
+    figures "^3.2.0"
+    gzip-size "^5.1.1"
+    pretty-bytes "^5.3.0"
+
 md5@^2.2.1:
   version "2.2.1"
   resolved "https://registry.yarnpkg.com/md5/-/md5-2.2.1.tgz#53ab38d5fe3c8891ba465329ea23fac0540126f9"
@@ -7093,6 +7110,11 @@ picomatch@^2.0.4, picomatch@^2.2.1:
   resolved "https://registry.yarnpkg.com/picomatch/-/picomatch-2.2.2.tgz#21f333e9b6b8eaff02468f5146ea406d345f4dad"
   integrity sha512-q0M/9eZHzmr0AulXyPwNfZjtwZ/RBZlbN3K3CErVrk50T2ASYI7Bye0EvekFY3IP1Nt2DHu0re+V2ZHIpMkuWg==
 
+pify@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/pify/-/pify-4.0.1.tgz#4b2cd25c50d598735c50292224fd8c6df41e3231"
+  integrity sha512-uB80kBFb/tfd68bVleG9T5GGsGPjJrLAUpR5PZIrhBnIaRTQRjqdJSsIKkOP6OAIFbj7GOrcudc5pNjZ+geV2g==
+
 pluralize@8.0.0:
   version "8.0.0"
   resolved "https://registry.yarnpkg.com/pluralize/-/pluralize-8.0.0.tgz#1a6fa16a38d12a1901e0320fa017051c539ce3b1"
@@ -7378,7 +7400,7 @@ postcss-value-parser@^4.0.2:
   resolved "https://registry.yarnpkg.com/postcss-value-parser/-/postcss-value-parser-4.1.0.tgz#443f6a20ced6481a2bda4fa8532a6e55d789a2cb"
   integrity sha512-97DXOFbQJhk71ne5/Mt6cOu6yxsSfM0QGQyl0L25Gca4yGWEGJaig7l7gbCX623VqTBNGLRLaVUCnNkcedlRSQ==
 
-postcss@^7.0.0, postcss@^7.0.1, postcss@^7.0.27, postcss@^7.0.31:
+postcss@^7.0.0, postcss@^7.0.1, postcss@^7.0.27:
   version "7.0.32"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.32.tgz#4310d6ee347053da3433db2be492883d62cec59d"
   integrity sha512-03eXong5NLnNCD05xscnGKGDZ98CyzoqPSMjOe6SuoQY7Z2hIj0Ld1g/O/UQRuOle2aRtiIRDg9tDcTGAkLfKw==
@@ -7456,6 +7478,11 @@ pretty-bytes@^4.0.2:
   resolved "https://registry.yarnpkg.com/pretty-bytes/-/pretty-bytes-4.0.2.tgz#b2bf82e7350d65c6c33aa95aaa5a4f6327f61cd9"
   integrity sha1-sr+C5zUNZcbDOqlaqlpPYyf2HNk=
 
+pretty-bytes@^5.3.0:
+  version "5.4.1"
+  resolved "https://registry.yarnpkg.com/pretty-bytes/-/pretty-bytes-5.4.1.tgz#cd89f79bbcef21e3d21eb0da68ffe93f803e884b"
+  integrity sha512-s1Iam6Gwz3JI5Hweaz4GoCD1WUNUIyzePFy5+Js2hjwGVt2Z79wNN+ZKOZ2vB6C+Xs6njyB84Z1IthQg8d9LxA==
+
 prettyjson@1.2.1, prettyjson@^1.1.3:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/prettyjson/-/prettyjson-1.2.1.tgz#fcffab41d19cab4dfae5e575e64246619b12d289"