diff --git a/titanembeds/blueprints/api/api.py b/titanembeds/blueprints/api/api.py
index 32d6ac4..1d08bb4 100644
--- a/titanembeds/blueprints/api/api.py
+++ b/titanembeds/blueprints/api/api.py
@@ -287,7 +287,7 @@ def create_unauthenticated_user():
     username = username.strip()
     if len(username) < 2 or len(username) > 32:
         abort(406)
-    if not all(x.isalpha() or x.isspace() or "-" == x or "_" == x for x in username):
+    if not all(x.isalnum() or x.isspace() or "-" == x or "_" == x for x in username):
         abort(406)
     if not check_guild_existance(guild_id):
         abort(404)