diff --git a/Responder.conf b/Responder.conf
index 1d014ef..b34d9a1 100644
--- a/Responder.conf
+++ b/Responder.conf
@@ -15,7 +15,7 @@ LDAP = On
 
 ; Custom challenge. 
 ; Use "Random" for generating a random challenge for each requests (Default)
-Challenge = 1122334455667788
+Challenge = Random
 
 ; SQLite Database file
 ; Delete this file to re-capture previously captured hashes