diff --git a/package-lock.json b/package-lock.json
index 8c5f99b..f4b3707 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -409,6 +409,19 @@
         "num2fraction": "^1.2.2",
         "postcss": "^5.2.5",
         "postcss-value-parser": "^3.2.3"
+      },
+      "dependencies": {
+        "postcss": {
+          "version": "5.2.18",
+          "resolved": "https://registry.npmjs.org/postcss/-/postcss-5.2.18.tgz",
+          "integrity": "sha512-zrUjRRe1bpXKsX1qAJNJjqZViErVuyEkMTRrwu4ud4sbTtIBRmtaYDrHmcGgmrbsW3MHfmtIf+vJumgQn+PrXg==",
+          "requires": {
+            "chalk": "^1.1.3",
+            "js-base64": "^2.1.9",
+            "source-map": "^0.5.6",
+            "supports-color": "^3.2.3"
+          }
+        }
       }
     },
     "aws-sign2": {
@@ -984,6 +997,11 @@
       "integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=",
       "dev": true
     },
+    "colorette": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/colorette/-/colorette-1.4.0.tgz",
+      "integrity": "sha512-Y2oEozpomLn7Q3HFP7dpww7AtMJplbM9lGZP6RDfHqmbeRjiwRg4n6VM6j4KLmRke85uWEI7JqF17f3pqdRA0g=="
+    },
     "combine-source-map": {
       "version": "0.8.0",
       "resolved": "https://registry.npmjs.org/combine-source-map/-/combine-source-map-0.8.0.tgz",
@@ -3718,9 +3736,9 @@
       }
     },
     "js-base64": {
-      "version": "2.5.1",
-      "resolved": "https://registry.npmjs.org/js-base64/-/js-base64-2.5.1.tgz",
-      "integrity": "sha512-M7kLczedRMYX4L8Mdh4MzyAMM9O5osx+4FcOQuTvr3A9F2D9S5JXheN0ewNbrvK2UatkTRhL5ejGmGSjNMiZuw=="
+      "version": "2.6.4",
+      "resolved": "https://registry.npmjs.org/js-base64/-/js-base64-2.6.4.tgz",
+      "integrity": "sha512-pZe//GGmwJndub7ZghVHz7vjb2LgC1m8B07Au3eYqeqv9emhESByMXxaEgkUkEqJe87oBbSniGYoQNIBklc7IQ=="
     },
     "js-stringify": {
       "version": "1.0.2",
@@ -4566,6 +4584,11 @@
       "integrity": "sha1-j7+rsKmKJT0xhDMfno3rc3L6xsA=",
       "dev": true
     },
+    "nanoid": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.2.0.tgz",
+      "integrity": "sha512-fmsZYa9lpn69Ad5eDn7FMcnnSR+8R34W9qJEijxYhTbfOWzr22n1QxCMzXLK+ODyW2973V3Fux959iQoUxzUIA=="
+    },
     "nash": {
       "version": "2.0.4",
       "resolved": "https://registry.npmjs.org/nash/-/nash-2.0.4.tgz",
@@ -6323,14 +6346,20 @@
       "dev": true
     },
     "postcss": {
-      "version": "5.2.5",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-5.2.5.tgz",
-      "integrity": "sha1-7EKMJ9/8f6xllhNAqbAi+kr18FY=",
+      "version": "8.2.13",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.2.13.tgz",
+      "integrity": "sha512-FCE5xLH+hjbzRdpbRb1IMCvPv9yZx2QnDarBEYSN0N0HYk+TcXsEhwdFcFb+SRWOKzKGErhIEbBK2ogyLdTtfQ==",
       "requires": {
-        "chalk": "^1.1.3",
-        "js-base64": "^2.1.9",
-        "source-map": "^0.5.6",
-        "supports-color": "^3.1.2"
+        "colorette": "^1.2.2",
+        "nanoid": "^3.1.22",
+        "source-map": "^0.6.1"
+      },
+      "dependencies": {
+        "source-map": {
+          "version": "0.6.1",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g=="
+        }
       }
     },
     "postcss-value-parser": {
diff --git a/package.json b/package.json
index a1ca260..78f6318 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "nprogress": "0.2.0",
     "onmount": "1.3.0",
     "pjax": "0.2.4",
-    "postcss": "5.2.5",
+    "postcss": "8.2.13",
     "pug": "^3.0.1",
     "stylus": "0.54.5",
     "uglifyify": "3.0.4",