diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index a47804ab07..230249d57c 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -6,7 +6,7 @@
 	"features": {
 		"ghcr.io/devcontainers-contrib/features/pnpm:2": {},
 		"ghcr.io/devcontainers/features/node:1": {
-			"version": "18.16.0"
+			"version": "20.4.0"
 		}
 	},
 	"forwardPorts": [3000],
diff --git a/.github/ISSUE_TEMPLATE/01_bug-report.md b/.github/ISSUE_TEMPLATE/01_bug-report.md
index 25e7fc8b20..b889d96eb3 100644
--- a/.github/ISSUE_TEMPLATE/01_bug-report.md
+++ b/.github/ISSUE_TEMPLATE/01_bug-report.md
@@ -54,7 +54,7 @@ Please include errors from the developer console and/or server log files if you
 
 * Installation Method or Hosting Service: <!-- Example: docker compose, k8s/docker, systemd, "Misskey install shell script", development environment -->
 * Misskey: 13.x.x
-* Node: 18.x.x
+* Node: 20.x.x
 * PostgreSQL: 15.x.x
 * Redis: 7.x.x
 * OS and Architecture: <!-- Example: Ubuntu 22.04.2 LTS aarch64 -->
diff --git a/.github/workflows/storybook.yml b/.github/workflows/storybook.yml
index 6cb1b34997..1aea8b5459 100644
--- a/.github/workflows/storybook.yml
+++ b/.github/workflows/storybook.yml
@@ -37,7 +37,7 @@ jobs:
       with:
         version: 8
         run_install: false
-    - name: Use Node.js 18.x
+    - name: Use Node.js 20.x
       uses: actions/setup-node@v3.6.0
       with:
         node-version-file: '.node-version'
diff --git a/.github/workflows/test-backend.yml b/.github/workflows/test-backend.yml
index d7be15bd4f..96e64c322e 100644
--- a/.github/workflows/test-backend.yml
+++ b/.github/workflows/test-backend.yml
@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [18.x]
+        node-version: [20.x]
 
     services:
       postgres:
diff --git a/.github/workflows/test-frontend.yml b/.github/workflows/test-frontend.yml
index 4ea4ba4628..eef68aa0d1 100644
--- a/.github/workflows/test-frontend.yml
+++ b/.github/workflows/test-frontend.yml
@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [18.x]
+        node-version: [20.x]
 
     steps:
     - uses: actions/checkout@v3.3.0
@@ -51,7 +51,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: [18.x]
+        node-version: [20.x]
         browser: [chrome]
 
     services:
diff --git a/.github/workflows/test-misskey-js.yml b/.github/workflows/test-misskey-js.yml
index b15e704c7f..213657ce1f 100644
--- a/.github/workflows/test-misskey-js.yml
+++ b/.github/workflows/test-misskey-js.yml
@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [18.x]
+        node-version: [20.x]
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
 
     steps:
diff --git a/.github/workflows/test-production.yml b/.github/workflows/test-production.yml
index 5243a83777..8429465b5b 100644
--- a/.github/workflows/test-production.yml
+++ b/.github/workflows/test-production.yml
@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [18.x]
+        node-version: [20.x]
 
     steps:
     - uses: actions/checkout@v3.3.0
diff --git a/.node-version b/.node-version
index 6d80269a4f..bd45cd74a2 100644
--- a/.node-version
+++ b/.node-version
@@ -1 +1 @@
-18.16.0
+20.4.0
diff --git a/CHANGELOG.md b/CHANGELOG.md
index db2b25aa19..a366729e4b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,9 @@
 
 ## 13.x.x (unreleased)
 
+### NOTE
+- Node.js 20.4.0以上が必要になりました
+
 ### General
 - identicon生成を無効にしてパフォーマンスを向上させることができるようになりました
 - サーバーのマシン情報の公開を無効にしてパフォーマンスを向上させることができるようになりました
diff --git a/Dockerfile b/Dockerfile
index fb389659bc..c6ddee2ae6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 # syntax = docker/dockerfile:1.4
 
-ARG NODE_VERSION=18.16.0-bullseye
+ARG NODE_VERSION=20.4.0-bullseye
 
 # build assets & compile TypeScript