diff --git a/Dockerfile b/Dockerfile
index a7c06c38d..fdcb0962c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -23,9 +23,10 @@ RUN apk add --no-cache \
     zlib-dev
 
 COPY package.json ./
-RUN yarn install
+RUN yarn install --prod=false
 COPY . ./
 RUN yarn build
+RUN yarn install --prod
 
 FROM base AS runner
 
diff --git a/docs/setup.en.md b/docs/setup.en.md
index 6dfbdbfea..98af1f41a 100644
--- a/docs/setup.en.md
+++ b/docs/setup.en.md
@@ -51,7 +51,7 @@ Please install and setup these softwares:
 
 5. Install misskey dependencies.
 
-	`yarn`
+	`yarn install --prod=false`
 
 *4.* Configure Misskey
 ----------------------------------------------------------------
@@ -130,7 +130,7 @@ You can check if the service is running with `systemctl status misskey`.
 ### How to update your Misskey server to the latest version
 1. `git checkout master`
 2. `git pull`
-3. `yarn install`
+3. `yarn install --prod=false`
 4. `NODE_ENV=production yarn build`
 5. `yarn migrate`
 6. Restart your Misskey process to apply changes
@@ -138,7 +138,7 @@ You can check if the service is running with `systemctl status misskey`.
 
 If you encounter any problems with updating, please try the following:
 1. `yarn clean` or `yarn cleanall`
-2. Retry update (Don't forget `yarn install`
+2. Retry update (Don't forget `yarn install --prod=false`)
 
 ----------------------------------------------------------------
 
diff --git a/docs/setup.fr.md b/docs/setup.fr.md
index 4ee0442c9..b4190d599 100644
--- a/docs/setup.fr.md
+++ b/docs/setup.fr.md
@@ -51,7 +51,7 @@ Installez les paquets suivants :
  
 5. Installez les dépendances de misskey.
 
-	`yarn install`
+	`yarn install --prod=false`
 
 *4.* Création du fichier de configuration
 ----------------------------------------------------------------
@@ -124,7 +124,7 @@ Vous pouvez vérifier si le service a démarré en utilisant la commande `system
 ### Méthode de mise à jour vers la plus récente version de Misskey
 1. `git checkout master`
 2. `git pull`
-3. `yarn install`
+3. `yarn install --prod=false`
 4. `NODE_ENV=production yarn build`
 5. `yarn migrate`
 
diff --git a/docs/setup.ja.md b/docs/setup.ja.md
index 444827e1f..eff709cda 100644
--- a/docs/setup.ja.md
+++ b/docs/setup.ja.md
@@ -53,7 +53,7 @@ adduser --disabled-password --disabled-login misskey
 
 5. Misskeyの依存パッケージをインストール
 
-	`yarn install`
+	`yarn install --prod=false`
 
 *4.* 設定ファイルを作成する
 ----------------------------------------------------------------
@@ -132,7 +132,7 @@ yarn run init
 ### Misskeyを最新バージョンにアップデートする方法:
 1. `git checkout master`
 2. `git pull`
-3. `yarn install`
+3. `yarn install --prod=false`
 4. `NODE_ENV=production yarn build`
 5. `yarn migrate`
 
diff --git a/package.json b/package.json
index 52e9f487f..5cda44006 100644
--- a/package.json
+++ b/package.json
@@ -32,20 +32,102 @@
 	},
 	"dependencies": {
 		"@elastic/elasticsearch": "7.4.0",
-		"@fortawesome/fontawesome-svg-core": "1.2.25",
-		"@fortawesome/free-brands-svg-icons": "5.11.2",
 		"@fortawesome/free-regular-svg-icons": "5.11.2",
 		"@fortawesome/free-solid-svg-icons": "5.11.2",
-		"@fortawesome/vue-fontawesome": "0.1.7",
 		"@koa/cors": "3.0.0",
 		"@koa/multer": "2.0.0",
 		"@koa/router": "8.0.2",
+		"agentkeepalive": "4.1.0",
+		"autobind-decorator": "2.4.0",
+		"autwh": "0.1.0",
+		"aws-sdk": "2.548.0",
+		"bcryptjs": "2.4.3",
+		"bull": "3.11.0",
+		"cafy": "15.1.1",
+		"cbor": "5.0.1",
+		"chalk": "2.4.2",
+		"cli-highlight": "2.1.1",
+		"commander": "3.0.2",
+		"content-disposition": "0.5.3",
+		"crc-32": "1.2.0",
+		"dateformat": "3.0.3",
+		"diskusage": "1.1.3",
+		"double-ended-queue": "2.1.0-0",
+		"feed": "4.0.0",
+		"file-type": "12.3.0",
+		"fluent-ffmpeg": "2.1.2",
+		"http-signature": "1.2.0",
+		"https-proxy-agent": "3.0.0",
+		"is-root": "2.1.0",
+		"is-svg": "4.2.0",
+		"js-yaml": "3.13.1",
+		"jsdom": "15.1.1",
+		"jsrsasign": "8.0.12",
+		"koa": "2.10.0",
+		"koa-bodyparser": "4.2.1",
+		"koa-compress": "3.0.0",
+		"koa-favicon": "2.0.1",
+		"koa-json-body": "5.3.0",
+		"koa-logger": "3.2.1",
+		"koa-mount": "4.0.0",
+		"koa-send": "5.0.0",
+		"koa-slow": "2.1.0",
+		"koa-views": "6.2.1",
+		"langmap": "0.0.16",
+		"lookup-dns-cache": "2.1.0",
+		"ms": "2.1.2",
+		"nested-property": "1.0.1",
+		"nodemailer": "6.3.1",
+		"os-utils": "0.0.14",
+		"parse5": "5.1.0",
+		"parsimmon": "1.13.0",
+		"portscanner": "2.2.0",
+		"promise-limit": "2.7.0",
+		"punycode": "2.1.1",
+		"pureimage": "0.1.6",
+		"qrcode": "1.4.2",
+		"random-seed": "0.3.0",
+		"ratelimiter": "3.3.1",
+		"recaptcha-promise": "0.1.3",
+		"redis": "2.8.0",
+		"redis-lock": "0.1.4",
+		"reflect-metadata": "0.1.13",
+		"rename": "1.0.4",
+		"request": "2.88.0",
+		"request-promise-native": "1.0.7",
+		"request-stats": "3.0.0",
+		"require-all": "3.0.0",
+		"rndstr": "1.0.0",
+		"seedrandom": "3.0.5",
+		"sharp": "0.23.1",
+		"showdown": "1.9.0",
+		"showdown-highlightjs-extension": "0.1.2",
+		"speakeasy": "2.0.0",
+		"stringz": "2.0.0",
+		"summaly": "2.3.1",
+		"syslog-pro": "1.0.0",
+		"systeminformation": "4.14.11",
+		"tmp": "0.1.0",
+		"typeorm": "0.2.19",
+		"ulid": "2.3.0",
+		"uuid": "3.3.3",
+		"web-push": "3.4.0",
+		"websocket": "1.0.30",
+		"pg": "7.12.1",
+		"pug": "2.0.4",
+		"xev": "2.0.1"
+	},
+	"devDependencies": {
+		"@fortawesome/fontawesome-svg-core": "1.2.25",
+		"@fortawesome/free-brands-svg-icons": "5.11.2",
+		"@fortawesome/vue-fontawesome": "0.1.7",
 		"@types/bcryptjs": "2.4.2",
 		"@types/bull": "3.10.3",
 		"@types/cbor": "2.0.0",
 		"@types/dateformat": "3.0.1",
 		"@types/deep-equal": "1.0.1",
 		"@types/double-ended-queue": "2.1.1",
+		"@types/fluent-ffmpeg": "2.1.10",
 		"@types/gulp": "4.0.6",
 		"@types/gulp-mocha": "0.0.32",
 		"@types/gulp-rename": "0.0.33",
@@ -101,37 +183,18 @@
 		"@types/websocket": "0.0.40",
 		"@types/ws": "6.0.3",
 		"@typescript-eslint/parser": "2.3.3",
-		"agentkeepalive": "4.1.0",
 		"animejs": "3.1.0",
 		"apexcharts": "3.10.0",
-		"autobind-decorator": "2.4.0",
 		"autosize": "4.0.2",
-		"autwh": "0.1.0",
-		"aws-sdk": "2.548.0",
-		"bcryptjs": "2.4.3",
 		"bootstrap": "4.3.1",
 		"bootstrap-vue": "2.0.4",
-		"bull": "3.11.0",
-		"cafy": "15.1.1",
-		"cbor": "5.0.1",
 		"chai": "4.2.0",
-		"chalk": "2.4.2",
-		"cli-highlight": "2.1.1",
-		"commander": "3.0.2",
-		"content-disposition": "0.5.3",
-		"crc-32": "1.2.0",
 		"css-loader": "3.2.0",
 		"cssnano": "4.1.10",
-		"dateformat": "3.0.3",
 		"deep-equal": "1.1.0",
-		"diskusage": "1.1.3",
-		"double-ended-queue": "2.1.0-0",
 		"eslint": "6.5.1",
 		"eslint-plugin-vue": "5.2.3",
 		"eventemitter3": "4.0.0",
-		"feed": "4.0.0",
-		"file-type": "12.3.0",
-		"fluent-ffmpeg": "2.1.2",
 		"gulp": "4.0.2",
 		"gulp-cssnano": "2.1.3",
 		"gulp-imagemin": "6.1.1",
@@ -146,98 +209,41 @@
 		"gulp-util": "3.0.8",
 		"hard-source-webpack-plugin": "0.13.1",
 		"html-minifier": "4.0.0",
-		"http-signature": "1.2.0",
-		"https-proxy-agent": "3.0.0",
 		"insert-text-at-cursor": "0.3.0",
-		"is-root": "2.1.0",
-		"is-svg": "4.2.0",
-		"js-yaml": "3.13.1",
-		"jsdom": "15.1.1",
 		"json5": "2.1.1",
 		"json5-loader": "3.0.0",
-		"jsrsasign": "8.0.12",
 		"katex": "0.11.1",
-		"koa": "2.10.0",
-		"koa-bodyparser": "4.2.1",
-		"koa-compress": "3.0.0",
-		"koa-favicon": "2.0.1",
-		"koa-json-body": "5.3.0",
-		"koa-logger": "3.2.1",
-		"koa-mount": "4.0.0",
-		"koa-send": "5.0.0",
-		"koa-slow": "2.1.0",
-		"koa-views": "6.2.1",
-		"langmap": "0.0.16",
 		"loader-utils": "1.2.3",
 		"lolex": "4.2.0",
-		"lookup-dns-cache": "2.1.0",
 		"mocha": "6.2.1",
 		"moji": "0.5.1",
-		"ms": "2.1.2",
 		"multer": "1.4.2",
-		"nested-property": "1.0.1",
 		"node-fetch": "2.6.0",
-		"nodemailer": "6.3.1",
 		"nprogress": "0.2.0",
 		"object-assign-deep": "0.4.0",
-		"os-utils": "0.0.14",
-		"parse5": "5.1.0",
-		"parsimmon": "1.13.0",
-		"pg": "7.12.1",
-		"portscanner": "2.2.0",
 		"postcss-loader": "3.0.0",
 		"prismjs": "1.17.1",
 		"progress-bar-webpack-plugin": "1.12.1",
-		"promise-limit": "2.7.0",
 		"promise-sequential": "1.1.1",
-		"pug": "2.0.4",
-		"punycode": "2.1.1",
-		"pureimage": "0.1.6",
-		"qrcode": "1.4.2",
-		"random-seed": "0.3.0",
 		"randomcolor": "0.5.4",
-		"ratelimiter": "3.3.1",
-		"recaptcha-promise": "0.1.3",
 		"reconnecting-websocket": "4.2.0",
-		"redis": "2.8.0",
-		"redis-lock": "0.1.4",
-		"reflect-metadata": "0.1.13",
-		"rename": "1.0.4",
-		"request": "2.88.0",
-		"request-promise-native": "1.0.7",
-		"request-stats": "3.0.0",
-		"require-all": "3.0.0",
 		"rimraf": "3.0.0",
-		"rndstr": "1.0.0",
 		"s-age": "1.1.2",
-		"seedrandom": "3.0.5",
-		"sharp": "0.23.1",
-		"showdown": "1.9.0",
-		"showdown-highlightjs-extension": "0.1.2",
-		"speakeasy": "2.0.0",
-		"stringz": "2.0.0",
 		"style-loader": "1.0.0",
 		"stylus": "0.54.7",
 		"stylus-loader": "3.0.2",
-		"summaly": "2.3.1",
-		"syslog-pro": "1.0.0",
-		"systeminformation": "4.14.11",
 		"syuilo-password-strength": "0.0.1",
 		"terser-webpack-plugin": "2.1.3",
 		"textarea-caret": "3.1.0",
 		"three": "0.109.0",
 		"tinycolor2": "1.4.1",
-		"tmp": "0.1.0",
 		"ts-loader": "6.2.0",
 		"ts-node": "8.4.1",
 		"tslint": "5.20.0",
 		"tslint-sonarts": "1.9.0",
-		"typeorm": "0.2.19",
 		"typescript": "3.6.4",
 		"uglify-es": "3.3.9",
-		"ulid": "2.3.0",
 		"url-loader": "2.2.0",
-		"uuid": "3.3.3",
 		"v-animate-css": "0.0.3",
 		"v-debounce": "0.1.2",
 		"vue": "2.6.10",
@@ -259,14 +265,8 @@
 		"vuewordcloud": "18.7.11",
 		"vuex": "3.1.1",
 		"vuex-persistedstate": "2.5.4",
-		"web-push": "3.4.0",
 		"webpack": "4.41.1",
 		"webpack-cli": "3.3.9",
-		"websocket": "1.0.30",
-		"ws": "7.1.2",
-		"xev": "2.0.1"
-	},
-	"devDependencies": {
-		"@types/fluent-ffmpeg": "2.1.10"
+		"ws": "7.1.2"
 	}
 }