diff --git a/static/fontsize.js b/static/fontsize.js
index 9f2a76e..2a414be 100644
--- a/static/fontsize.js
+++ b/static/fontsize.js
@@ -149,7 +149,7 @@ styleInject(css);
 
 function install(hook, vm) {
     hook.afterEach(function (html) {
-        const savedSize = localStorage.getItem('font-size') || 15;
+        const savedSize = localStorage.getItem('font-size') || 17;
         const lang = document.documentElement.lang;
         const fontSizeText = lang === 'zh' ? `当前字体大小: ${savedSize}px` : `Font size: ${savedSize}px`;
         var fontSizeButtons = `