diff --git a/nip05.ts b/nip05.ts
index d1d6c06..2cc9869 100644
--- a/nip05.ts
+++ b/nip05.ts
@@ -36,7 +36,7 @@ export async function queryProfile(
     name = '_'
   }
 
-  if (!name.match(/^[a-z0-9-_]+$/)) return null
+  if (!name.match(/^[A-Za-z0-9-_]+$/)) return null
 
   let res = await (
     await _fetch(`https://${domain}/.well-known/nostr.json?name=${name}`)