diff --git a/gatsby-config.js b/gatsby-config.js
index f3ddb08..43a3719 100644
--- a/gatsby-config.js
+++ b/gatsby-config.js
@@ -151,7 +151,7 @@ module.exports = {
     {
       resolve: 'gatsby-plugin-polyfill-io',
       options: {
-         features: ['IntersectionObserver'],
+         features: ['IntersectionObserver', 'document'],
       },
    },
     'gatsby-plugin-react-helmet',