diff --git a/src/register-service-worker.js b/src/register-service-worker.js
index a077b4a..38335f0 100644
--- a/src/register-service-worker.js
+++ b/src/register-service-worker.js
@@ -10,7 +10,7 @@ const isLocalhost = Boolean(
 )
 
 export default function register () {
-  if (process.env.NODE_ENV === ' production' && 'serviceWorker' in navigator) {
+  if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
     // The URL constructor is available in all browsers that support SW.
     const publicUrl = new URL('/', window.location)
     if (publicUrl.origin !== window.location.origin) {