diff --git a/Dockerfile b/Dockerfile
index 3a9ec26..2fc4d0a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,6 +2,7 @@
 FROM golang:1.25-alpine AS builder
 WORKDIR /app
 COPY go.mod go.sum ./
+ENV GOPROXY=https://goproxy.cn,direct
 RUN go mod download
 COPY . .
 RUN CGO_ENABLED=0 go build -o pr-helper .