diff --git a/frontend/src/utils/hexToBase91.ts b/frontend/src/utils/hexToBase91.ts
index 73955d3a..3eb5ccf0 100644
--- a/frontend/src/utils/hexToBase91.ts
+++ b/frontend/src/utils/hexToBase91.ts
@@ -1,10 +1,8 @@
-import { Base91 } from 'base-ex';
+import { Base16, Base91 } from 'base-ex';
 
-export default function hexToBase85(hex: string): string {
-  const hexes = hex.match(/.{1,2}/g);
-  if (hexes == null) return '';
-  const byteArray = hexes.map((byte) => parseInt(byte, 16));
+export default function hexToBase91(hex: string): string {
+  const b16 = new Base16();
   const b91 = new Base91();
-  const base91string = b91.encode(new Uint8Array(byteArray));
+  const base91string = b91.encode(b16.decode(hex));
   return base91string;
 }