diff --git a/packages/learn/gatsby-ssr.js b/packages/learn/gatsby-ssr.js
index 587bc21679..d12b78fc1c 100644
--- a/packages/learn/gatsby-ssr.js
+++ b/packages/learn/gatsby-ssr.js
@@ -23,7 +23,7 @@ export const onRenderBody = ({ setHeadComponents, setPostBodyComponents }) => {
   setHeadComponents([...headComponents]);
   setPostBodyComponents([
     <script
-      async='true'
+      async={true}
       key='chai-CDN'
       src='https://cdnjs.cloudflare.com/ajax/libs/chai/4.1.2/chai.min.js'
     />,