diff --git a/package-lock.json b/package-lock.json
index dbf01ee..60a5ddd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -123,19 +123,6 @@
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-      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.2.tgz",
-      "integrity": "sha512-3NUJZdhMhcdPn8vJ9v2UQJoH0qqoGUkYTgFEPZaPjEtwmmKUfNV46zZmgB2M5M4DCEQHMaCfWHCxiBflLm04Tg==",
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-    "color-name": {
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-      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.1.tgz",
-      "integrity": "sha1-SxQVMEz1ACjqgWQ2Q72C6gWANok="
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       "resolved": "https://registry.npmjs.org/color-support/-/color-support-1.1.3.tgz",
@@ -236,7 +223,8 @@
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-      "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ="
+      "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ=",
+      "dev": true
     },
     "esprima": {
       "version": "4.0.1",
@@ -370,11 +358,6 @@
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-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
-      "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0="
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       "resolved": "https://registry.npmjs.org/http-signature/-/http-signature-1.2.0.tgz",
@@ -572,6 +555,11 @@
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       "dev": true
     },
+    "nanoid": {
+      "version": "3.3.6",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.6.tgz",
+      "integrity": "sha512-BGcqMMJuToF7i1rt+2PWSNVnWIkGCU78jBG3RxO/bZlnZPK2Cmi2QaffxGO/2RvWi9sL+FAiRiXMgsyxQ1DIDA=="
+    },
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       "resolved": "https://registry.npmjs.org/nodeunit/-/nodeunit-0.11.3.tgz",
@@ -621,6 +609,7 @@
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           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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             "longest": "^1.0.1",
@@ -1803,7 +1792,8 @@
         "longest": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "loose-envify": {
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@@ -3266,39 +3256,19 @@
       "integrity": "sha1-Ywn04OX6kT7BxpMHrjZLSzd8nns=",
       "dev": true
     },
+    "picocolors": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.0.0.tgz",
+      "integrity": "sha512-1fygroTLlHu66zi26VoTDv8yRgm0Fccecssto+MhsZ0D/DGW2sm8E8AjW7NU5VVTRt5GxbeZ5qBuJr+HyLYkjQ=="
+    },
     "postcss": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.0.tgz",
-      "integrity": "sha512-ACgL/mXREjfCothsspfbxdiXIQowQeEyW7TJgsvAgCK8igWa2ZNCsbGNGnasbEF1++L9xb7qYpo23Aa3rGmiCg==",
+      "version": "8.4.31",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.31.tgz",
+      "integrity": "sha512-PS08Iboia9mts/2ygV3eLpY5ghnUcfLV/EXTOW1E2qYxJKGGBUtNjN76FYHnMs36RmARn41bC0AZmn+rR0OVpQ==",
       "requires": {
-        "chalk": "^2.4.1",
-        "source-map": "^0.6.1",
-        "supports-color": "^5.4.0"
-      },
-      "dependencies": {
-        "ansi-styles": {
-          "version": "3.2.1",
-          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
-          "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
-          "requires": {
-            "color-convert": "^1.9.0"
-          }
-        },
-        "chalk": {
-          "version": "2.4.1",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.1.tgz",
-          "integrity": "sha512-ObN6h1v2fTJSmUXoS3nMQ92LbDK9be4TV+6G+omQlGJFdcUX5heKi1LZ1YnRMIgwTLEj3E24bT6tYni50rlCfQ==",
-          "requires": {
-            "ansi-styles": "^3.2.1",
-            "escape-string-regexp": "^1.0.5",
-            "supports-color": "^5.3.0"
-          }
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-        "source-map": {
-          "version": "0.6.1",
-          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
-          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g=="
-        }
+        "nanoid": "^3.3.6",
+        "picocolors": "^1.0.0",
+        "source-map-js": "^1.0.2"
       }
     },
     "process-nextick-args": {
@@ -3403,6 +3373,11 @@
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       "dev": true
     },
+    "source-map-js": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.0.2.tgz",
+      "integrity": "sha512-R0XvVJ9WusLiqTCEiGCmICCMplcCkIwwR11mOSD9CR5u+IXYdiseeEuXCVAjS54zqwkLcPNnmU4OeJ6tUrWhDw=="
+    },
     "source-map-support": {
       "version": "0.5.6",
       "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.6.tgz",
@@ -3461,14 +3436,6 @@
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       }
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-    "supports-color": {
-      "version": "5.4.0",
-      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.4.0.tgz",
-      "integrity": "sha512-zjaXglF5nnWpsq470jSv6P9DwPvgLkuapYmfDm3JWOm0vkNTVF2tI4UrN2r6jH1qM/uc/WtxYY1hYoA2dOKj5w==",
-      "requires": {
-        "has-flag": "^3.0.0"
-      }
-    },
     "tap": {
       "version": "12.0.1",
       "resolved": "https://registry.npmjs.org/tap/-/tap-12.0.1.tgz",
diff --git a/package.json b/package.json
index 3262dd2..ded1e9a 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
   },
   "dependencies": {
     "minimist": "^1.2.0",
-    "postcss": "^7.0.0"
+    "postcss": "^8.4.31"
   },
   "devDependencies": {
     "nodeunit": "^0.11.3"