diff --git a/backend/Dockerfile b/backend/Dockerfile
index 668f27b..a5a1a4b 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -1,5 +1,5 @@
 # Stage 1: 依赖安装 + 构建
-FROM node:20-alpine AS builder
+FROM node:22-alpine AS builder
 WORKDIR /app
 
 # 先装依赖（缓存最大化）