diff --git a/Dockerfile b/Dockerfile
index 9d566fbe2..813b4a37f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.9.0-buster
+FROM python:3.9.0-alpine
 
 RUN pip install -i https://pypi.tuna.tsinghua.edu.cn/simple --upgrade pip && pip install -i https://pypi.tuna.tsinghua.edu.cn/simple mkdocs mkdocs-material