diff --git a/src/core/render-core.js b/src/core/render-core.js
index 2b050df1..7fc6b17b 100644
--- a/src/core/render-core.js
+++ b/src/core/render-core.js
@@ -174,7 +174,7 @@ async function render(_opts = {}) {
       }
       data = await page.pdf(opts.pdf);
     } else if (opts.output === 'html') {
-      data = await page.evaluate(() => document.body.innerHTML);
+      data = await page.evaluate(() => document.documentElement.innerHTML);
     } else {
       // This is done because puppeteer throws an error if fullPage and clip is used at the same
       // time even though clip is just empty object {}
@@ -248,4 +248,3 @@ function logOpts(opts) {
 module.exports = {
   render,
 };
-