diff --git a/.gitea/workflows/pr-checks.yml b/.gitea/workflows/pr-checks.yml
index 06251e5..5b7b261 100644
--- a/.gitea/workflows/pr-checks.yml
+++ b/.gitea/workflows/pr-checks.yml
@@ -44,7 +44,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 20
+          node-version: 22.23.4
           cache: npm
           cache-dependency-path: server/package-lock.json
       - name: Check core names no module identifier
@@ -90,7 +90,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 20
+          node-version: 22.23.4
           cache: npm
           cache-dependency-path: client/package-lock.json
       - name: Install client deps
@@ -113,7 +113,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 20
+          node-version: 22.23.4
           cache: npm
           cache-dependency-path: bot/package-lock.json
       - name: Install bot deps
diff --git a/Dockerfile b/Dockerfile
index 0131633..1c62b0f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:20-alpine
+FROM node:22.23.4-alpine
 
 WORKDIR /app
 
diff --git a/README.md b/README.md
index 306d44d..12d1058 100644
--- a/README.md
+++ b/README.md
@@ -147,7 +147,7 @@ flowchart TB
 
 | Layer | Tech |
 |---|---|
-| Backend | Node.js 20+, Express 4, `mariadb` driver (parameterized SQL, no ORM) |
+| Backend | Node.js 22 (images pin 22.23.4), Express 4, `mariadb` driver (parameterized SQL, no ORM) |
 | Auth | Session service over JWT: httpOnly cookie (web) + bearer access/refresh tokens (mobile), bcrypt hashing, optional TOTP 2FA (`speakeasy` + `qrcode`), pluggable OAuth2/OIDC SSO (built-in Google & Discord + generic) |
 | Database | MariaDB 11 (own container) |
 | Frontend | React 18, Vite 5, React Router 6 |
@@ -196,7 +196,8 @@ website/
 
 ## Prerequisites
 
-- **Node.js 20+** and npm (Node 22/24 are fine).
+- **Node.js 22.23.4+** (or 24.22.1+) and npm. Older builds carry the Node2Shell Brotli bug
+  (CVE-2026-111497), and Node 20 is past end of life.
 - **Docker Desktop** (for MariaDB, and for the full Compose deploy).
 
 ---
diff --git a/bot/Dockerfile b/bot/Dockerfile
index 22cc939..2d8a920 100644
--- a/bot/Dockerfile
+++ b/bot/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:20-alpine
+FROM node:22.23.4-alpine
 
 WORKDIR /app/bot