diff --git a/Dockerfile b/Dockerfile
index 9af42a4..87ccbbf 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,9 +1,14 @@
 FROM ubuntu:18.04
 
 COPY build/java_policy /etc
+#RUN sed -E -i -e 's/(archive|ports).ubuntu.com/mirrors.tuna.tsinghua.edu.cn/g' -e '/security.ubuntu.com/d' /etc/apt/sources.list
 RUN buildDeps='software-properties-common git libtool cmake python-dev python3-pip python-pip libseccomp-dev' && \
-    apt-get update && apt-get install -y python python3 python-pkg-resources python3-pkg-resources gcc g++ $buildDeps && \
-    add-apt-repository ppa:openjdk-r/ppa && add-apt-repository ppa:longsleep/golang-backports && apt-get update && apt-get install -y golang-go openjdk-8-jdk && \
+    apt-get update && apt-get install -y python python3 python-pkg-resources python3-pkg-resources $buildDeps && \
+    add-apt-repository ppa:openjdk-r/ppa && add-apt-repository ppa:longsleep/golang-backports && \
+    add-apt-repository ppa:ubuntu-toolchain-r/test && \
+    apt-get update && apt-get install -y golang-go openjdk-11-jdk gcc-9 g++-9 && \
+    update-alternatives --install  /usr/bin/gcc gcc /usr/bin/gcc-9 40 && \
+    update-alternatives --install  /usr/bin/g++ g++ /usr/bin/g++-9 40 && \
     pip3 install -I --no-cache-dir psutil gunicorn flask requests idna && \
     cd /tmp && git clone -b newnew  --depth 1 https://github.com/QingdaoU/Judger && cd Judger && \
     mkdir build && cd build && cmake .. && make && make install && cd ../bindings/Python && python3 setup.py install && \