diff --git a/Dockerfile b/Dockerfile
index 06a701f..8b8f0ab 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -50,9 +50,9 @@ WORKDIR /app
 # 阿里源加速
 RUN npm config set registry https://registry.npmmirror.com
 
-# 只装运行时依赖
+# 只装运行时依赖 (better-sqlite3 是 @powersync/node 的 devOptional peer, 需同时 omit optional 才能跳过)
 COPY package*.json ./
-RUN --mount=type=cache,target=/root/.npm npm ci --omit=dev
+RUN --mount=type=cache,target=/root/.npm npm ci --omit=dev --omit=optional
 
 # 拷贝构建产物
 COPY --from=builder /app/dist ./dist