diff --git a/Dockerfile b/Dockerfile
index e614f3f..aedb863 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -47,7 +47,7 @@ RUN export http_proxy=${PROXY} && \
 RUN export http_proxy=${PROXY} && \
     export https_proxy=${PROXY} && \
     apt-get update && \
-    apt-get install --no-install-recommends -y python3.9 python3.9-dev python3.9-venv python3-pip python3-wheel build-essential && \
+    apt-get install --no-install-recommends -y python3.8 python3.8-dev python3.8-venv python3-pip python3-wheel build-essential && \
     apt-get clean
 
 # 安装 docker 环境