diff --git a/package-lock.json b/package-lock.json
index 01c9de1..1a5e95c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -990,6 +990,12 @@
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@@ -14824,6 +15356,26 @@
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+        "indexes-of": "^1.0.1",
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@@ -16482,20 +17045,6 @@
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diff --git a/package.json b/package.json
index 863f6a5..7802b0b 100644
--- a/package.json
+++ b/package.json
@@ -2,23 +2,14 @@
   "name": "nes.css",
   "description": "NES.css is NES-style CSS Framework.",
   "scripts": {
-    "watch": "npm run build:sass -- --watch",
+    "watch": "npm run build:main -- --watch",
     "// Build task": "",
     "build": "run-p build:core build:main",
-    "build:core": "npm run build:sass-core && npm run build:autoprefix-core && npm run build:cleancss-core",
-    "build:main": "npm run build:sass && npm run build:autoprefix && npm run build:cleancss",
+    "build:core": "postcss scss/nes-core.scss --output css/nes-core.css",
+    "build:main": "postcss scss/nes.scss --output css/nes.css -m",
     "prebuild": "run-p prebuild:*",
     "prebuild:stylelint": "npm run stylelint -- --fix",
-    "prebuild:clean": "rimraf css",
     "postbuild": "npm run build:storybook",
-    "// For nes.css": "",
-    "build:sass": "node-sass --output-style expanded --source-map true --functions scripts/scssFunctions.js scss/nes.scss css/nes.css",
-    "build:autoprefix": "postcss --use autoprefixer --map false --output css/nes.css css/nes.css",
-    "build:cleancss": "cleancss -o css/nes.min.css css/nes.css",
-    "// For nes-core.css": "",
-    "build:sass-core": "node-sass --output-style expanded --source-map true --functions scripts/scssFunctions.js scss/nes-core.scss css/nes-core.css",
-    "build:autoprefix-core": "postcss --use autoprefixer --map false --output css/nes-core.css css/nes-core.css",
-    "build:cleancss-core": "cleancss -o css/nes-core.min.css css/nes-core.css",
     "// Misc": "",
     "stylelint": "stylelint scss/**/*.scss",
     "storybook": "start-storybook -p 6006",
@@ -72,8 +63,6 @@
     "postcss-node-sass": "^2.1.8",
     "postcss-preset-env": "^6.6.0",
     "prettier": "^1.15.2",
-    "rimraf": "^2.6.2",
-    "sass-loader": "^7.1.0",
     "semantic-release": "^15.13.13",
     "style-loader": "^0.23.1",
     "stylelint": "^9.5.0",