diff --git a/api/Dockerfile b/api/Dockerfile
index 85b3ffa2..11153a75 100644
--- a/api/Dockerfile
+++ b/api/Dockerfile
@@ -1,15 +1,22 @@
-FROM golang:1.20.2-alpine3.17 AS builder
-
-WORKDIR /app
+FROM golang:1.21.2-alpine3.18 AS builder
 
 LABEL stage=gobuilder
+
 ENV CGO_ENABLED 0
 ENV GOARCH amd64
 ENV GOPROXY https://goproxy.cn,direct
 
+RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.sjtug.sjtu.edu.cn/g' /etc/apk/repositories && \
+    apk update --no-cache && apk add --no-cache tzdata
+
+WORKDIR /app
+
+ADD go.mod .
+ADD go.sum .
+RUN go mod download
 COPY . .
 COPY api/etc/ /app/
-RUN go mod download && go build -o pcm-coordinator-api /app/api/pcm.go
+RUN go build -o pcm-coordinator-api /app/api/pcm.go
 
 
 FROM alpine:3.16.2
diff --git a/rpc/Dockerfile b/rpc/Dockerfile
index 3c82bddd..9c211753 100644
--- a/rpc/Dockerfile
+++ b/rpc/Dockerfile
@@ -1,15 +1,22 @@
-FROM golang:1.20.2-alpine3.17 AS builder
-
-WORKDIR /app
+FROM golang:1.21.2-alpine3.18 AS builder
 
 LABEL stage=gobuilder
+
 ENV CGO_ENABLED 0
 ENV GOARCH amd64
 ENV GOPROXY https://goproxy.cn,direct
 
+RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.sjtug.sjtu.edu.cn/g' /etc/apk/repositories && \
+    apk update --no-cache && apk add --no-cache tzdata
+
+WORKDIR /app
+
+ADD go.mod .
+ADD go.sum .
+RUN go mod download
 COPY . .
 COPY rpc/etc/ /app/
-RUN go mod download && go build -o pcm-coordinator-rpc /app/rpc/pcmcore.go
+RUN go build -o pcm-coordinator-rpc /app/rpc/pcmcore.go
 
 
 FROM alpine:3.16.2