diff --git a/dockerfile b/dockerfile
index e7302b0..9044747 100644
--- a/dockerfile
+++ b/dockerfile
@@ -1,23 +1,14 @@
-FROM debian:buster-slim AS git_installer
+FROM python:3.7-slim
 
+ENV TZ=Asia/Shanghai
 RUN sed -i 's/deb.debian.org/mirrors.aliyun.com/g' /etc/apt/sources.list && \
     sed -i 's/security.debian.org/mirrors.aliyun.com\/debian-security/g' /etc/apt/sources.list
-
+RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
 RUN apt-get update && \
     apt-get install -y git curl ca-certificates libcurl4-openssl-dev && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/*
 
-FROM python:3.7-slim
-
-ENV TZ=Asia/Shanghai
-RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
-
-COPY --from=git_installer /usr/bin/git /usr/bin/git
-COPY --from=git_installer /usr/bin/curl /usr/bin/curl
-COPY --from=git_installer /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
-COPY --from=git_installer /usr/lib/x86_64-linux-gnu /usr/lib/x86_64-linux-gnu
-
 WORKDIR /opt/ScopeSentry/
 
 COPY ./ScopeSentry /opt/ScopeSentry/