diff --git a/backend/Dockerfile b/backend/Dockerfile
index 0aa2e3a..e3c0472 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -2,7 +2,7 @@
 # 多阶段构建，优化镜像大小和安全性
 
 # Stage 1: 构建阶段
-FROM bitnami/golang:1.23.6 AS builder
+FROM golang:1.23-alpine AS builder
 
 # 设置工作目录
 WORKDIR /app