diff --git a/Dockerfile b/Dockerfile
index 62d6c9d..5fdc0c1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,6 +8,7 @@ RUN npm run build
 
 # ---- 后端构建 ----
 FROM golang:1.24-alpine AS go-builder
+ENV GOTOOLCHAIN=auto
 WORKDIR /app/server
 COPY server/go.mod server/go.sum ./
 RUN go mod download