diff --git a/app/src/protyle/export/index.ts b/app/src/protyle/export/index.ts
index 609f1d582..5af37c1fb 100644
--- a/app/src/protyle/export/index.ts
+++ b/app/src/protyle/export/index.ts
@@ -82,6 +82,7 @@ const renderPDF = (id: string) => {
     const html = `<!DOCTYPE html>
 <html lang="${window.siyuan.config.appearance.lang}" data-theme-mode="light" data-light-theme="${window.siyuan.config.appearance.themeLight}" data-dark-theme="${window.siyuan.config.appearance.themeDark}">
 <head>
+    <base href="${servePath}/">
     <meta charset="utf-8">
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0"/>
