diff --git a/src/utility/utils.ts b/src/utility/utils.ts
index fff7834..59c371d 100644
--- a/src/utility/utils.ts
+++ b/src/utility/utils.ts
@@ -43,7 +43,7 @@ export const encodeBase64 = (data: string) => {
   return Buffer.from(data).toString('base64');
 };
 export const decodeBase64 = (data: string) => {
-  return Buffer.from(data, 'base64').toString('ascii');
+  return Buffer.from(data, 'base64').toString('utf-8');
 };
 
 export const objectToJSON = (obj: object) => {