diff --git a/Dockerfile b/Dockerfile
index 599211e..720ab6a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.14.9-alpine3.11 as builder
+FROM golang:1.20.6-alpine3.18 as builder
 MAINTAINER xtaci <daniel820313@gmail.com>
 ENV GO111MODULE=on
 RUN apk update && \
@@ -6,7 +6,7 @@ RUN apk update && \
     apk add git gcc libc-dev linux-headers
 RUN go get -ldflags "-X main.VERSION=$(date -u +%Y%m%d) -s -w" github.com/xtaci/kcptun/client && go get -ldflags "-X main.VERSION=$(date -u +%Y%m%d) -s -w" github.com/xtaci/kcptun/server
 
-FROM alpine:3.11
+FROM alpine:3.18
 RUN apk add --no-cache iptables
 COPY --from=builder /go/bin /bin
 EXPOSE 29900/udp