diff --git a/app/src/protyle/export/index.ts b/app/src/protyle/export/index.ts
index aa6593d15..e92cf3c1d 100644
--- a/app/src/protyle/export/index.ts
+++ b/app/src/protyle/export/index.ts
@@ -79,8 +79,9 @@ const renderPDF = (id: string) => {
     if (!isDefault) {
         themeStyle = `<link rel="stylesheet" type="text/css" id="themeStyle" href="${servePath}/appearance/themes/${window.siyuan.config.appearance.themeLight}/${window.siyuan.config.appearance.customCSS ? "custom" : "theme"}.css?${Constants.SIYUAN_VERSION}"/>`;
     }
+    // data-theme-mode="light" https://github.com/siyuan-note/siyuan/issues/7379
     const html = `<!DOCTYPE html>
-<html lang="${window.siyuan.config.appearance.lang}" data-theme-mode="${getThemeMode()}" data-light-theme="${window.siyuan.config.appearance.themeLight}" data-dark-theme="${window.siyuan.config.appearance.themeDark}">
+<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>
     <meta charset="utf-8">
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
