diff --git a/src/app/register/RegisterForm.tsx b/src/app/register/RegisterForm.tsx
index a6a08be..4106f02 100644
--- a/src/app/register/RegisterForm.tsx
+++ b/src/app/register/RegisterForm.tsx
@@ -74,7 +74,8 @@ export default function RegisterForm({ ticket }: { ticket: string }) {
           ].map((ref) => ref.current?.value);
           const avatar = avatarRef.current?.files?.[0];
 
-          const avatarBase64 = avatar != null ? fileAsBase64(avatar!) : null;
+          const avatarBase64 =
+            avatar != null ? await fileAsBase64(avatar!) : null;
 
           if (password !== confirmPassword) {
             setPasswordMismatch(true);