diff --git a/package-lock.json b/package-lock.json
index e063a10..d20adfa 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -17,6 +17,7 @@
         "highlight.js": "^10.4.1",
         "live-server": "^1.2.1",
         "mkdirp": "^1.0.4",
+        "postcss": "^8.2.12",
         "postcss-calc": "^7.0.2",
         "postcss-copy": "^7.1.0",
         "postcss-css-variables": "^0.14.0",
@@ -3197,7 +3198,6 @@
       "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.1.22.tgz",
       "integrity": "sha512-/2ZUaJX2ANuLtTvqTlgqBQNJoQO398KyJgZloL0PZkC0dpysjncRUPsFe3DUPzz/y3h+u7C46np8RMuvF3jsSQ==",
       "dev": true,
-      "peer": true,
       "bin": {
         "nanoid": "bin/nanoid.cjs"
       },
@@ -3516,7 +3516,6 @@
       "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.2.12.tgz",
       "integrity": "sha512-BJnGT5+0q2tzvs6oQfnY2NpEJ7rIXNfBnZtQOKCIsweeWXBXeDd5k31UgTdS3d/c02ouspufn37mTaHWkJyzMQ==",
       "dev": true,
-      "peer": true,
       "dependencies": {
         "colorette": "^1.2.2",
         "nanoid": "^3.1.22",
@@ -7850,8 +7849,7 @@
       "version": "3.1.22",
       "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.1.22.tgz",
       "integrity": "sha512-/2ZUaJX2ANuLtTvqTlgqBQNJoQO398KyJgZloL0PZkC0dpysjncRUPsFe3DUPzz/y3h+u7C46np8RMuvF3jsSQ==",
-      "dev": true,
-      "peer": true
+      "dev": true
     },
     "nanomatch": {
       "version": "1.2.13",
@@ -8091,7 +8089,6 @@
       "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.2.12.tgz",
       "integrity": "sha512-BJnGT5+0q2tzvs6oQfnY2NpEJ7rIXNfBnZtQOKCIsweeWXBXeDd5k31UgTdS3d/c02ouspufn37mTaHWkJyzMQ==",
       "dev": true,
-      "peer": true,
       "requires": {
         "colorette": "^1.2.2",
         "nanoid": "^3.1.22",
diff --git a/package.json b/package.json
index d7078f2..cfc97d3 100644
--- a/package.json
+++ b/package.json
@@ -35,6 +35,7 @@
     "highlight.js": "^10.4.1",
     "live-server": "^1.2.1",
     "mkdirp": "^1.0.4",
+    "postcss": "^8.2.12",
     "postcss-calc": "^7.0.2",
     "postcss-copy": "^7.1.0",
     "postcss-css-variables": "^0.14.0",