diff --git a/lib/core/utilities.js b/lib/core/utilities.js
index 55522a915..9ddb554d4 100644
--- a/lib/core/utilities.js
+++ b/lib/core/utilities.js
@@ -25,7 +25,7 @@ export const encodeQuery = queryObject => {
     .join('&')
 }
 
-export const randomString = () => btoa(Math.random() + '').replace('==', '')
+export const randomString = () => (process.browser ? btoa(Math.random() + '') : Buffer.from(Math.random() + '').toString('base64')).replace('==', '')
 
 export const routeOption = (route, key, value) => {
   return route.matched.some(m => {