diff --git a/packages/@vuepress/theme-default/components/SidebarLink.vue b/packages/@vuepress/theme-default/components/SidebarLink.vue
index 243ce7630b..bc5de287d8 100644
--- a/packages/@vuepress/theme-default/components/SidebarLink.vue
+++ b/packages/@vuepress/theme-default/components/SidebarLink.vue
@@ -32,12 +32,13 @@ export default {
       ? renderExternal(h, item.path, item.title || item.path)
       : renderLink(h, item.path, item.title || item.path, active)
 
-    const configDepth = $page.frontmatter.sidebarDepth
-      || sidebarDepth
-      || $themeLocaleConfig.sidebarDepth
-      || $themeConfig.sidebarDepth
-
-    const maxDepth = configDepth == null ? 1 : configDepth
+    const maxDepth = [
+      $page.frontmatter.sidebarDepth,
+      sidebarDepth,
+      $themeLocaleConfig.sidebarDepth,
+      $themeConfig.sidebarDepth,
+      1
+    ].find(depth => depth !== undefined);
 
     const displayAllHeaders = $themeLocaleConfig.displayAllHeaders
       || $themeConfig.displayAllHeaders
diff --git a/packages/docs/docs/guide/directory-structure.md b/packages/docs/docs/guide/directory-structure.md
index 6c421cb67b..cf66608712 100644
--- a/packages/docs/docs/guide/directory-structure.md
+++ b/packages/docs/docs/guide/directory-structure.md
@@ -45,7 +45,7 @@ Please note the capitalization of the directory name.
 - `docs/.vuepress/enhanceApp.js`: App level enhancement.
 
 ::: warning Note
-When customizing `templates/ssr.html`, or `templates/dev.html`, it is best to modify it on the basis of the [default template files](https://github.com/vuejs/vuepress/blob/master/packages/%40vuepress/core/lib/app/index.dev.html), otherwise it may cause a build failure.
+When customizing `templates/ssr.html`, or `templates/dev.html`, it is best to modify it on the basis of the [default template files](https://github.com/vuejs/vuepress/blob/master/packages/%40vuepress/core/lib/client/index.dev.html), otherwise it may cause a build failure.
 :::
 
 ## Default Page Routing