diff --git a/kcptun/Dockerfile b/kcptun/Dockerfile
index dc88346..47aaccc 100644
--- a/kcptun/Dockerfile
+++ b/kcptun/Dockerfile
@@ -2,12 +2,12 @@
 # Dockerfile for kcptun
 #
 
-FROM alpine
-MAINTAINER kev <noreply@easypi.pro>
+FROM alpine:3
+MAINTAINER EasyPi Software Foundation
 
-ENV KCPTUN_VERSION 20171201
-ENV KCPTUN_FILE kcptun-linux-amd64-${KCPTUN_VERSION}.tar.gz
-ENV KCPTUN_URL https://github.com/xtaci/kcptun/releases/download/v${KCPTUN_VERSION}/${KCPTUN_FILE}
+ENV KCPTUN_VERSION=20210922
+ENV KCPTUN_FILE=kcptun-linux-amd64-${KCPTUN_VERSION}.tar.gz
+ENV KCPTUN_URL=https://github.com/xtaci/kcptun/releases/download/v${KCPTUN_VERSION}/${KCPTUN_FILE}
 
 RUN set -xe \
     && apk add --no-cache curl \
diff --git a/kcptun/README.md b/kcptun/README.md
index 1515c9f..2c785e7 100644
--- a/kcptun/README.md
+++ b/kcptun/README.md
@@ -10,32 +10,36 @@ kcptun
 ## docker-compose.yml
 
 ```yaml
-server:
-  image: vimagick/kcptun
-  command:
-    --listen :29900
-    --target google-public-dns-a.google.com:53
-    --crypt aes
-    --mode fast
-  ports:
-    - "29900:29900/udp"
-  environment:
-    - KCPTUN_KEY=******
-  restart: always
+version: "3.8"
 
-client:
-  image: vimagick/kcptun
-  entrypoint: client_linux_amd64
-  command:
-    --localaddr :12948
-    --remoteaddr easypi.pro:29900
-    --crypt aes
-    --mode fast
-  ports:
-    - "12948:12948/tcp"
-  environment:
-    - KCPTUN_KEY=******
-  restart: always
+services:
+
+  server:
+    image: vimagick/kcptun
+    command:
+      --listen :29900
+      --target google-public-dns-a.google.com:53
+      --crypt aes
+      --mode fast
+    ports:
+      - "29900:29900/udp"
+    environment:
+      - KCPTUN_KEY=******
+    restart: unless-stopped
+
+  client:
+    image: vimagick/kcptun
+    entrypoint: client_linux_amd64
+    command:
+      --localaddr :12948
+      --remoteaddr easypi.pro:29900
+      --crypt aes
+      --mode fast
+    ports:
+      - "12948:12948/tcp"
+    environment:
+      - KCPTUN_KEY=******
+    restart: unless-stopped
 ```
 
 ## Server Setup
diff --git a/kcptun/docker-compose.yml b/kcptun/docker-compose.yml
index 7edffce..61d0dfe 100644
--- a/kcptun/docker-compose.yml
+++ b/kcptun/docker-compose.yml
@@ -1,26 +1,30 @@
-server:
-  image: vimagick/kcptun
-  command:
-    --listen :29900
-    --target google-public-dns-a.google.com:53
-    --crypt aes
-    --mode fast
-  ports:
-    - "29900:29900/udp"
-  environment:
-    - KCPTUN_KEY=******
-  restart: always
+version: "3.8"
 
-client:
-  image: vimagick/kcptun
-  entrypoint: client_linux_amd64
-  command:
-    --localaddr :12948
-    --remoteaddr easypi.pro:29900
-    --crypt aes
-    --mode fast
-  ports:
-    - "12948:12948/tcp"
-  environment:
-    - KCPTUN_KEY=******
-  restart: always
+services:
+
+  server:
+    image: vimagick/kcptun
+    command:
+      --listen :29900
+      --target google-public-dns-a.google.com:53
+      --crypt aes
+      --mode fast
+    ports:
+      - "29900:29900/udp"
+    environment:
+      - KCPTUN_KEY=******
+    restart: unless-stopped
+
+  client:
+    image: vimagick/kcptun
+    entrypoint: client_linux_amd64
+    command:
+      --localaddr :12948
+      --remoteaddr easypi.pro:29900
+      --crypt aes
+      --mode fast
+    ports:
+      - "12948:12948/tcp"
+    environment:
+      - KCPTUN_KEY=******
+    restart: unless-stopped