diff --git a/configure_priv.sh b/configure_priv.sh
index 342547d..7f68efd 100755
--- a/configure_priv.sh
+++ b/configure_priv.sh
@@ -28,7 +28,7 @@ configure_tuna() {
         if [ -f /etc/apt/sources.list.d/ubuntu.sources ] && grep -q tuna /etc/apt/sources.list.d/ubuntu.sources; then
             echo "检测到已切换到 Tuna 源，跳过覆盖。"
         else
-            sudo cp $scriptdir/files/sources.list/ubuntu.sources /etc/apt/sources.list.d/ubuntu.sources
+            sed "s|__CODENAME__|$(lsb_release -cs)|g" "$scriptdir/files/sources.list/ubuntu.sources" | sudo tee /etc/apt/sources.list.d/ubuntu.sources >/dev/null
         fi
     fi
 }
diff --git a/files/sources.list/ubuntu.sources b/files/sources.list/ubuntu.sources
index 66990fc..f11b4ef 100644
--- a/files/sources.list/ubuntu.sources
+++ b/files/sources.list/ubuntu.sources
@@ -1,11 +1,11 @@
 Types: deb
 URIs: https://mirrors.tuna.tsinghua.edu.cn/ubuntu/
-Suites: noble noble-updates noble-backports
+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: noble-security
+Suites: __CODENAME__-security
 Components: main restricted universe multiverse
 Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg