diff --git a/backend/Dockerfile b/backend/Dockerfile
index de47d81..108aa3a 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -3,6 +3,10 @@ FROM node:20-alpine
 WORKDIR /usr/src/app
 
 COPY package*.json ./
+                                                                                         │
+# Set timezone to Asia/Shanghai                                                           │
+RUN apk add --no-cache tzdata                                                             │
+ENV TZ=Asia/Shanghai                                                                      │                 
 RUN npm install
 
 COPY . .
diff --git a/backend/app.js b/backend/app.js
index b483410..1547278 100644
--- a/backend/app.js
+++ b/backend/app.js
@@ -195,3 +195,5 @@ smtpServer.on('error', err => {
 smtpServer.listen(smtpPort, () => {
   logger.info(`SMTP server listening on port ${smtpPort}`);
 });
+
+