diff --git a/package-lock.json b/package-lock.json
index 88e7dc2..367c5b5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -35,7 +35,7 @@
         "mocha": "^9.1.4",
         "multipipe": "^2.0.3",
         "node-png": "^0.4.3",
-        "postcss": "^8.4.5",
+        "postcss": "^8.4.31",
         "postcss-cli": "^9.1.0",
         "sass": "^1.49.0",
         "serve": "^14.1.2",
@@ -6433,21 +6433,31 @@
       }
     },
     "node_modules/postcss": {
-      "version": "8.4.5",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.5.tgz",
-      "integrity": "sha512-jBDboWM8qpaqwkMwItqTQTiFikhs/67OYVvblFFTM7MrZjt6yMKd6r2kgXizEbTTljacm4NldIlZnhbjr84QYg==",
+      "version": "8.4.31",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.31.tgz",
+      "integrity": "sha512-PS08Iboia9mts/2ygV3eLpY5ghnUcfLV/EXTOW1E2qYxJKGGBUtNjN76FYHnMs36RmARn41bC0AZmn+rR0OVpQ==",
       "dev": true,
+      "funding": [
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/postcss/"
+        },
+        {
+          "type": "tidelift",
+          "url": "https://tidelift.com/funding/github/npm/postcss"
+        },
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/ai"
+        }
+      ],
       "dependencies": {
-        "nanoid": "^3.1.30",
+        "nanoid": "^3.3.6",
         "picocolors": "^1.0.0",
-        "source-map-js": "^1.0.1"
+        "source-map-js": "^1.0.2"
       },
       "engines": {
         "node": "^10 || ^12 || >=14"
-      },
-      "funding": {
-        "type": "opencollective",
-        "url": "https://opencollective.com/postcss/"
       }
     },
     "node_modules/postcss-cli": {
@@ -6639,6 +6649,24 @@
       "integrity": "sha512-1NNCs6uurfkVbeXG4S8JFT9t19m45ICnif8zWLd5oPSZ50QnwMfK+H3jv408d4jw/7Bttv5axS5IiHoLaVNHeQ==",
       "dev": true
     },
+    "node_modules/postcss/node_modules/nanoid": {
+      "version": "3.3.6",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.6.tgz",
+      "integrity": "sha512-BGcqMMJuToF7i1rt+2PWSNVnWIkGCU78jBG3RxO/bZlnZPK2Cmi2QaffxGO/2RvWi9sL+FAiRiXMgsyxQ1DIDA==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/ai"
+        }
+      ],
+      "bin": {
+        "nanoid": "bin/nanoid.cjs"
+      },
+      "engines": {
+        "node": "^10 || ^12 || ^13.7 || ^14 || >=15.0.1"
+      }
+    },
     "node_modules/pretty-hrtime": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/pretty-hrtime/-/pretty-hrtime-1.0.3.tgz",
@@ -13178,14 +13206,22 @@
       "integrity": "sha512-Wb4p1J4zyFTbM+u6WuO4XstYx4Ky9Cewe4DWrel7B0w6VVICvPwdOpotjzcf6eD8TsckVnIMNONQyPIUFOUbCQ=="
     },
     "postcss": {
-      "version": "8.4.5",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.5.tgz",
-      "integrity": "sha512-jBDboWM8qpaqwkMwItqTQTiFikhs/67OYVvblFFTM7MrZjt6yMKd6r2kgXizEbTTljacm4NldIlZnhbjr84QYg==",
+      "version": "8.4.31",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.31.tgz",
+      "integrity": "sha512-PS08Iboia9mts/2ygV3eLpY5ghnUcfLV/EXTOW1E2qYxJKGGBUtNjN76FYHnMs36RmARn41bC0AZmn+rR0OVpQ==",
       "dev": true,
       "requires": {
-        "nanoid": "^3.1.30",
+        "nanoid": "^3.3.6",
         "picocolors": "^1.0.0",
-        "source-map-js": "^1.0.1"
+        "source-map-js": "^1.0.2"
+      },
+      "dependencies": {
+        "nanoid": {
+          "version": "3.3.6",
+          "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.6.tgz",
+          "integrity": "sha512-BGcqMMJuToF7i1rt+2PWSNVnWIkGCU78jBG3RxO/bZlnZPK2Cmi2QaffxGO/2RvWi9sL+FAiRiXMgsyxQ1DIDA==",
+          "dev": true
+        }
       }
     },
     "postcss-cli": {
diff --git a/package.json b/package.json
index c047730..4faf338 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "mocha": "^9.1.4",
     "multipipe": "^2.0.3",
     "node-png": "^0.4.3",
-    "postcss": "^8.4.5",
+    "postcss": "^8.4.31",
     "postcss-cli": "^9.1.0",
     "sass": "^1.49.0",
     "serve": "^14.1.2",