diff --git a/Dockerfile b/Dockerfile
index 5edddc3..e32bbea 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@
 # ---------------------------------------------------------------
 # Stage 1 — install dependencies (cached until package*.json change)
 # ---------------------------------------------------------------
-FROM node:22-alpine AS deps
+FROM node:20-alpine AS deps
 WORKDIR /app
 COPY package.json package-lock.json ./
 RUN npm ci
@@ -17,7 +17,7 @@ RUN npm ci
 # key, ENCRYPTION_KEY, META_APP_SECRET, ...) are read at runtime and
 # must NOT be baked into the image.
 # ---------------------------------------------------------------
-FROM node:22-alpine AS builder
+FROM node:20-alpine AS builder
 WORKDIR /app
 COPY --from=deps /app/node_modules ./node_modules
 COPY . .
@@ -37,7 +37,7 @@ RUN npm run build
 # ---------------------------------------------------------------
 # Stage 3 — minimal runtime (standalone output)
 # ---------------------------------------------------------------
-FROM node:22-alpine AS runner
+FROM node:20-alpine AS runner
 WORKDIR /app
 ENV NODE_ENV=production \
     NEXT_TELEMETRY_DISABLED=1 \