diff --git a/files/sources.list/ubuntu.sources b/files/sources.list/ubuntu.sources
index f11b4ef..0313480 100644
--- a/files/sources.list/ubuntu.sources
+++ b/files/sources.list/ubuntu.sources
@@ -1,11 +1,5 @@
 Types: deb
 URIs: https://mirrors.tuna.tsinghua.edu.cn/ubuntu/
-Suites: __CODENAME__ __CODENAME__-updates __CODENAME__-backports
-Components: main restricted universe multiverse
-Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg
-
-Types: deb
-URIs: https://mirrors.tuna.tsinghua.edu.cn/ubuntu/
-Suites: __CODENAME__-security
+Suites: __CODENAME__ __CODENAME__-updates __CODENAME__-backports __CODENAME__-security
 Components: main restricted universe multiverse
 Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg