diff --git a/Dockerfile b/Dockerfile
index a1f1ffa..da392fe 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,16 +4,16 @@ ENV TZ=Asia/Shanghai \
 
 ADD . /app
 
-RUN  echo "deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse\
-    deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse\
-    deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse\
-    deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse\
-    deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse\
-    deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse\
-    deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse\
-    deb-src http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse\
-    deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse\
-    deb-src http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse" >/etc/apt/sources.list \
+RUN  echo "deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse\n \
+    deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse\n\
+    deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse\n\
+    deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multivers\ne\
+    deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse\n\
+    deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse\n\
+    deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse\n\
+    deb-src http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse\n\
+    deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse\n\
+    deb-src http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse\n" >/etc/apt/sources.list \
     && apt update \
     && apt install -y tzdata \
     && ln -fs /usr/share/zoneinfo/${TZ} /etc/localtime \