diff --git a/src/index.ts b/src/index.ts
index e1e256b..e1be4d3 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -198,14 +198,8 @@ async function importKey(key: string | JsonWebKey, algorithm: SubtleCryptoImport
 
 function decodePayload<T = any>(raw: string): T | undefined {
     try {
-        const binaryString = atob(raw)
-        const bytes = new Uint8Array(binaryString.length);
-        for (let i = 0; i < binaryString.length; i++) {
-            bytes[i] = binaryString.charCodeAt(i);
-        }
-
-        const decoder = new TextDecoder('utf-8');
-        const decodedString = decoder.decode(bytes);
+        const bytes = Array.from(atob(raw), char => char.charCodeAt(0));
+        const decodedString = new TextDecoder('utf-8').decode(new Uint8Array(bytes));
 
         return JSON.parse(decodedString);
     } catch {