diff --git a/package-lock.json b/package-lock.json
index f10fe93..b668947 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "@yliaho/postcss-plugin-hsluv",
-  "version": "0.0.1",
+  "version": "0.1.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -1293,6 +1293,11 @@
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       "integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU="
     },
+    "colorette": {
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/colorette/-/colorette-1.2.2.tgz",
+      "integrity": "sha512-MKGMzyfeuutC/ZJ1cba9NqcNpfeqMUcYmyF1ZFY6/Cn7CNSAKx6a+s48sqLqyAiZuaP2TcqMhoo+dlwFnVxT9w=="
+    },
     "combined-stream": {
       "version": "1.0.8",
       "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz",
@@ -3943,6 +3948,11 @@
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       "dev": true
     },
+    "nanoid": {
+      "version": "3.1.23",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.1.23.tgz",
+      "integrity": "sha512-FiB0kzdP0FFVGDKlRLEQ1BgDzU87dy5NnzjeW9YZNt+/c3+q82EQDUwniSAUxp/F0gFNI1ZhKU1FqYsMuqZVnw=="
+    },
     "nanomatch": {
       "version": "1.2.13",
       "resolved": "https://registry.npmjs.org/nanomatch/-/nanomatch-1.2.13.tgz",
@@ -4269,13 +4279,13 @@
       "dev": true
     },
     "postcss": {
-      "version": "7.0.27",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.27.tgz",
-      "integrity": "sha512-WuQETPMcW9Uf1/22HWUWP9lgsIC+KEHg2kozMflKjbeUtw9ujvFX6QmIfozaErDkmLWS9WEnEdEe6Uo9/BNTdQ==",
+      "version": "8.2.10",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.2.10.tgz",
+      "integrity": "sha512-b/h7CPV7QEdrqIxtAf2j31U5ef05uBDuvoXv6L51Q4rcS1jdlXAVKJv+atCFdUXYl9dyTHGyoMzIepwowRJjFw==",
       "requires": {
-        "chalk": "^2.4.2",
-        "source-map": "^0.6.1",
-        "supports-color": "^6.1.0"
+        "colorette": "^1.2.2",
+        "nanoid": "^3.1.22",
+        "source-map": "^0.6.1"
       }
     },
     "postcss-functions": {
@@ -5133,14 +5143,6 @@
       "integrity": "sha512-BrpvfNAE3dcvq7ll3xVumzjKjZQ5tI1sEUIKr3Uoks0XUl45St3FlatVqef9prk4jRDzhW6WZg+3bk93y6pLjA==",
       "dev": true
     },
-    "supports-color": {
-      "version": "6.1.0",
-      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-6.1.0.tgz",
-      "integrity": "sha512-qe1jfm1Mg7Nq/NSh6XE24gPXROEVsWHxC1LIx//XNlD9iw7YZQGjZNjYN7xGaEG6iKdA8EtNFW6R0gjnVXp+wQ==",
-      "requires": {
-        "has-flag": "^3.0.0"
-      }
-    },
     "supports-hyperlinks": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/supports-hyperlinks/-/supports-hyperlinks-2.1.0.tgz",
diff --git a/package.json b/package.json
index 0433d8a..439f563 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
   "dependencies": {
     "css-color-converter": "^1.1.0",
     "hsluv": "^0.1.0",
-    "postcss": "^7.0.27",
+    "postcss": "^8.2.10",
     "postcss-functions": "^3.0.0"
   },
   "devDependencies": {