diff --git a/dynamicweb/settings/base.py b/dynamicweb/settings/base.py
index 9d5cf2bb..735cd913 100644
--- a/dynamicweb/settings/base.py
+++ b/dynamicweb/settings/base.py
@@ -761,7 +761,7 @@ OTP_VERIFY_ENDPOINT = env('OTP_VERIFY_ENDPOINT')
 FIRST_VM_ID_AFTER_EU_VAT = int_env('FIRST_VM_ID_AFTER_EU_VAT')
 PRE_EU_VAT_RATE = float(env('PRE_EU_VAT_RATE'))
 
-MAX_USERNAME_LENGTH = int_env('MAX_USERNAME_LENGTH', 18)
+MAX_USERNAME_LENGTH = int_env('MAX_USERNAME_LENGTH', 64)
 
 if DEBUG:
     from .local import *  # flake8: noqa