diff --git a/src/chacha.js b/src/chacha.js
--- a/src/chacha.js
+++ b/src/chacha.js
@@ -8,7 +8,7 @@ function lrot(x,shift){
 function createNonce(){
 	let nonce=new Uint8Array(12);
 	window.crypto.getRandomValues(nonce);
-	return nonce;
+	return Array.from(nonce);
 }
 
 /**