diff --git a/.vuepress/theme/SidebarGroup.vue b/.vuepress/theme/SidebarGroup.vue
index 05f42215..baa9ef83 100644
--- a/.vuepress/theme/SidebarGroup.vue
+++ b/.vuepress/theme/SidebarGroup.vue
@@ -81,6 +81,6 @@ function getSelectedVersion(item) {
       ? pathVersion
       : item.currentVersion;
   }
-  return item.currentVersion;
+  return item.currentVersion || item.versions[0].name;
 }
 </script>