diff --git a/b64ToUInt8.ts b/b64ToUInt8.ts
index 100edc9..2da6712 100644
--- a/b64ToUInt8.ts
+++ b/b64ToUInt8.ts
@@ -2,7 +2,7 @@ export default function urlB64ToUint8Array(base64String: string) {
   const padding = "=".repeat((4 - (base64String.length % 4)) % 4)
   const base64 = (base64String + padding).replace(/\-/g, "+").replace(/_/g, "/")
 
-  const rawData = window.atob(base64)
+  const rawData = atob(base64)
   const outputArray = new Uint8Array(rawData.length)
 
   for (let i = 0; i < rawData.length; ++i) {