diff --git a/generate_user_passwords.py b/generate_user_passwords.py
index 80dceab..1215612 100644
--- a/generate_user_passwords.py
+++ b/generate_user_passwords.py
@@ -11,7 +11,7 @@
 YAML_PARENT_VARIABLE = 'user_passwords'
 DEFAULT_PASSWORD_LENGTH = 12
 # Unambigous chars
-ALLOWED_PASSWORD_CHARS = 'abcdefghkmnoprstwxzABCDEFGHJKLMNPQRTWXY3468'
+ALLOWED_PASSWORD_CHARS = 'abcdefghkmnoprstwxzABCDEFGHJKLMNPQRTWXZ123456789'
 # More secure chars, but harder to type
 # ALLOWED_PASSWORD_CHARS = string.ascii_letters + string.digits + '!@$%^&*+=/'