diff --git a/package-lock.json b/package-lock.json
index 204bedb..ab066d3 100644
--- a/package-lock.json
+++ b/package-lock.json
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-      "resolved": "https://registry.npmjs.org/uniq/-/uniq-1.0.1.tgz",
-      "integrity": "sha1-sxxa6CVIRKOoKBVBzisEuGWnNP8="
-    },
-    "uniqs": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/uniqs/-/uniqs-2.0.0.tgz",
-      "integrity": "sha1-/+3ks2slKQaW5uFl1KWe25mOawI="
+      "integrity": "sha512-PqSoPh/pWetQ2phoj5RLiaqIk4kCNwoV3CI+LfGmWLKI3rE3kl1h59XpX2BjgDrmbxD9ARtQobPGU1SguCYuQg==",
+      "dev": true
     },
     "unpipe": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
       "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
     },
-    "unquote": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/unquote/-/unquote-1.1.1.tgz",
-      "integrity": "sha1-j97XMk7G6IoP+LkF58CYzcCG1UQ="
+    "update-browserslist-db": {
+      "version": "1.0.10",
+      "resolved": "https://registry.npmjs.org/update-browserslist-db/-/update-browserslist-db-1.0.10.tgz",
+      "integrity": "sha512-OztqDenkfFkbSG+tRxBeAnCVPckDBcvibKd35yDONx6OU8N7sqgwc7rCbkJ/WcYtVRZ4ba68d6byhC21GFh7sQ==",
+      "requires": {
+        "escalade": "^3.1.1",
+        "picocolors": "^1.0.0"
+      }
     },
     "upper-case": {
       "version": "1.1.3",
@@ -5039,17 +4857,6 @@
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
       "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
     },
-    "util.promisify": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/util.promisify/-/util.promisify-1.0.1.tgz",
-      "integrity": "sha512-g9JpC/3He3bm38zsLupWryXHoEcS22YHthuPQSJdMy6KNrzIRzWqcsHzD/WUnqe45whVou4VIsPew37DoXWNrA==",
-      "requires": {
-        "define-properties": "^1.1.3",
-        "es-abstract": "^1.17.2",
-        "has-symbols": "^1.0.1",
-        "object.getownpropertydescriptors": "^2.1.0"
-      }
-    },
     "utils-merge": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
@@ -5074,11 +4881,6 @@
       "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
       "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
     },
-    "vendors": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/vendors/-/vendors-1.0.4.tgz",
-      "integrity": "sha512-/juG65kTL4Cy2su4P8HjtkTxk6VmJDiOPBufWniqQ6wknac6jNiXS9vU+hO3wgusiyqWlzTbVHi0dyJqRONg3w=="
-    },
     "verror": {
       "version": "1.10.0",
       "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
@@ -5134,6 +4936,11 @@
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
       "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI="
     },
+    "yaml": {
+      "version": "1.10.2",
+      "resolved": "https://registry.npmjs.org/yaml/-/yaml-1.10.2.tgz",
+      "integrity": "sha512-r3vXyErRCYJ7wg28yvBY5VSoAF8ZvlcW9/BwUzEtUsjvX/DKs24dIkuwjtuprwJJHsbyUbLApepYTR1BN4uHrg=="
+    },
     "yargs": {
       "version": "7.1.0",
       "resolved": "https://registry.npmjs.org/yargs/-/yargs-7.1.0.tgz",
diff --git a/package.json b/package.json
index 3906641..601d8a4 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "express-session": "^1.17.0",
     "node-fetch": "^2.6.0",
     "node-sass": "^4.13.1",
-    "rollup-plugin-postcss": "^2.5.0",
+    "rollup-plugin-postcss": "^4.0.2",
     "sass": "^1.26.3",
     "sirv": "^0.4.0",
     "svelte-preprocess": "^3.7.1"