diff --git a/backend/Dockerfile b/backend/Dockerfile
index 4a9df83..44a9f49 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -11,7 +11,7 @@ COPY package.json pnpm-lock.yaml ./
 COPY .npmrc ./
 
 # 安装依赖（pnpm 会读取 .npmrc 中的 onlyBuiltDependencies）
-RUN corepack enable && pnpm install --frozen-lockfile
+RUN corepack enable && pnpm install --frozen-lockfile --config.onlyBuiltDependencies="@prisma/client,@prisma/engines,esbuild,prisma"
 
 # 复制 Prisma schema 并生成客户端
 COPY prisma/ ./prisma/