diff --git a/Dockerfile b/Dockerfile
index d694fba..0bb9460 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,6 +3,7 @@ FROM golang:1.24.1-alpine AS builder
 WORKDIR /app
 COPY . .
 ENV CGO_ENABLED=0
+RUN git submodule update --init --recursive
 RUN go mod download
 RUN go build -v -o V2bX -tags "sing xray hysteria2 with_reality_server with_quic with_grpc with_utls with_wireguard with_acme with_gvisor"