diff --git a/Makefile b/Makefile
index 1df5b33..8ae2c48 100644
--- a/Makefile
+++ b/Makefile
@@ -31,23 +31,23 @@ build:
 tools/%:
 	go build -gcflags="-trimpath=${HOME}" -ldflags="-w" test/tools/$*/$*.go
 
-docker: clean packages
+docker-build: # clean packages
 		mv dist/Gunfish_linux_amd64_v1 dist/Gunfish_linux_amd64
 		docker buildx build \
-				--build-arg VERSION=v${GIT_VER} \
+				--build-arg VERSION=${GIT_VER} \
 				--platform linux/amd64,linux/arm64 \
 				-f docker/Dockerfile \
-				-t kayac/gunfish:v${GIT_VER} \
-				-t ghcr.io/kayac/gunfish:v${GIT_VER} \
+				-t kayac/gunfish:${GIT_VER} \
+				-t ghcr.io/kayac/gunfish:${GIT_VER} \
 				.
 
 docker-push:
 		mv dist/Gunfish_linux_amd64_v1 dist/Gunfish_linux_amd64
 		docker buildx build \
-				--build-arg VERSION=v${GIT_VER} \
+				--build-arg VERSION=${GIT_VER} \
 				--platform linux/amd64,linux/arm64 \
 				-f docker/Dockerfile \
-				-t katsubushi/katsubushi:v${GIT_VER} \
-				-t ghcr.io/kayac/gunfish:v${GIT_VER} \
+				-t katsubushi/katsubushi:${GIT_VER} \
+				-t ghcr.io/kayac/gunfish:${GIT_VER} \
 				--push \
 				.
diff --git a/README.md b/README.md
index edfbf53..c6f2bbc 100644
--- a/README.md
+++ b/README.md
@@ -194,7 +194,7 @@ Here is an example configuration:
 
 ```toml
 [provider]
-port = 8203
+port = 8003
 worker_num = 8
 queue_size = 2000
 max_request_size = 1000
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 8e5a33e..774b6e0 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,16 +1,10 @@
-FROM alpine:3.9
+FROM alpine:3.18
 LABEL maintainer "FUJIWARA Shunichiro <fujiwara.shunichiro@gmail.com>"
 
-ARG version
-
-RUN apk --no-cache add unzip curl && \
-    mkdir -p /etc/gunfish /opt/gunfish && \
-    curl -sL https://github.com/kayac/Gunfish/releases/download/${version}/gunfish-${version}-linux-amd64.zip > /tmp/gunfish-${version}-linux-amd64.zip && \
-    cd /tmp && \
-    unzip gunfish-${version}-linux-amd64.zip && \
-    install gunfish-${version}-linux-amd64 /usr/bin/gunfish && \
-    rm -f /tmp/gunfish*
-
+ARG VERSION
+ARG TARGETARCH
+ADD dist/Gunfish_linux_${TARGETARCH}/gunfish /usr/local/bin/gunifish
+EXPOSE 8003
 WORKDIR /opt/gunfish
 
-ENTRYPOINT ["/usr/bin/gunfish"]
+ENTRYPOINT ["/usr/local/bin/gunfish"]