diff --git a/components/nav-menu.js b/components/nav-menu.js
index caaca51..f2b5212 100644
--- a/components/nav-menu.js
+++ b/components/nav-menu.js
@@ -13,7 +13,7 @@ export class NavMenu extends HTMLElement {
         display: flex;
         flex-direction: column;
         color: #000;
-        max-height: 100vh;
+        max-height: 100dvh;
       }
       h1 {
         width: 100%;
@@ -25,6 +25,7 @@ export class NavMenu extends HTMLElement {
       .page-list {
         flex-grow: 1;
         overflow-y: auto;
+        padding-bottom: 50px;
       }
       a {
         display: block;
diff --git a/components/page.js b/components/page.js
index 341a64f..fc8086b 100644
--- a/components/page.js
+++ b/components/page.js
@@ -71,7 +71,7 @@ export class Page extends HTMLElement {
       iframe {
         border: none;
         width: 100%;
-        height: 90vh;
+        height: 90dvh;
       }
       :host(.editing) iframe {
         display: none;
@@ -135,7 +135,7 @@ export class Page extends HTMLElement {
 
   get body() {
     try {
-      return localStorage.getItem(this.path) ?? ''
+      return localStorage.getItem(this.path)
     } catch (err) {
       console.error(err)
       return ''
diff --git a/sw.js b/sw.js
index 60f4c03..e2554ce 100644
--- a/sw.js
+++ b/sw.js
@@ -9,7 +9,7 @@ async function initCache() {
     '/components/header.js',
     '/components/nav-menu.js',
     '/components/page-menu.js',
-  ]) //6
+  ]) //7
 }
 
 self.addEventListener("install", event => {