diff --git a/gatsby-browser.js b/gatsby-browser.js
index 2ff0ee3e..1626bd79 100644
--- a/gatsby-browser.js
+++ b/gatsby-browser.js
@@ -27,17 +27,6 @@ const theme = createMuiTheme({
   },
 });
 
-export const onServiceWorkerUpdateReady = () => {
-  // eslint-disable-next-line no-alert
-  const answer = window.confirm(
-    `This application has been updated. ` +
-      `Reload to display the latest version?`,
-  );
-  if (answer === true) {
-    window.location.reload();
-  }
-};
-
 // eslint-disable-next-line import/prefer-default-export
 export const wrapRootElement = ({ element }) => (
   <SettingsProvider>