diff --git a/src/lib/helpers.ts b/src/lib/helpers.ts
index 22e22c97..d940d1b4 100644
--- a/src/lib/helpers.ts
+++ b/src/lib/helpers.ts
@@ -14,7 +14,8 @@ export function uuid() {
   })
 }
 
-export const isBrowser = () => typeof document !== 'undefined'
+export const isBrowser = () =>
+  typeof window !== 'undefined' && typeof document !== 'undefined'
 
 const localStorageWriteTests = {
   tested: false,