diff --git a/backend/Dockerfile b/backend/Dockerfile
index 9a220a7..f536ccd 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -1,6 +1,7 @@
 FROM golang:1.26-alpine AS builder
 WORKDIR /src
 COPY go.mod go.sum ./
+ENV GOPROXY=https://goproxy.cn
 RUN go mod download
 COPY . .
 RUN CGO_ENABLED=0 go build -trimpath -ldflags="-s -w" -o /out/api ./cmd/server