diff --git a/extras/shell-caller.sh b/extras/shell-caller.sh
index f9cb5921..dbf8e932 100755
--- a/extras/shell-caller.sh
+++ b/extras/shell-caller.sh
@@ -158,7 +158,7 @@ case "$command_type" in
         elif [[ "$2" == "ssupdate" ]]; then
                 /usr/bin/aptss "${@:2}" -y 2>&1
                 exit_code=$?
-                exit $?
+                exit $exit_code
         else
             # 非 remove/install 命令，拒绝执行
             echo "拒绝执行 aptss 白名单外的指令"
diff --git a/src/modules/updateCenter.ts b/src/modules/updateCenter.ts
index 693011a5..75a0033a 100644
--- a/src/modules/updateCenter.ts
+++ b/src/modules/updateCenter.ts
@@ -139,6 +139,15 @@ export const createUpdateCenterStore = (): UpdateCenterStore => {
     isOpen.value = true;
     loading.value = true;
     try {
+      // 打开更新中心时先刷新软件源，避免使用旧的 apt 缓存导致扫不到更新
+      try {
+        await window.ipcRenderer.invoke(
+          "update-center-run-system-update",
+          storeFilter,
+        );
+      } catch (error) {
+        console.error("[UpdateCenter] open: system update failed", error);
+      }
       const nextSnapshot = await window.updateCenter.open(storeFilter);
       applySnapshot(nextSnapshot);
     } finally {