diff --git a/Dockerfile b/Dockerfile
index aa0e305..92ae4dd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,11 +1,11 @@
-FROM python:alpine as builder
+FROM python:3.9-alpine as builder
 
 RUN apk update && apk add  --no-cache tzdata alpine-sdk libffi-dev ca-certificates
 ADD requirements.txt /tmp/
 RUN pip3 install --user -r /tmp/requirements.txt && rm /tmp/requirements.txt
 
 
-FROM python:alpine
+FROM python:3.9-alpine
 WORKDIR /ytdlbot
 ENV TZ=Asia/Shanghai