diff --git a/firefox-regional/fanboy-adblocklist-cz.txt b/firefox-regional/fanboy-adblocklist-cz.txt
index c0c8d878b..63392d5b7 100644
--- a/firefox-regional/fanboy-adblocklist-cz.txt
+++ b/firefox-regional/fanboy-adblocklist-cz.txt
@@ -1,5 +1,5 @@
 [Adblock Plus 1.1]
-! Checksum: XPWFl51KGUKyGM7tZTqJWA
+! Checksum: FO0JPUwwi1GVM9UeeXRFSA
 ! Fanboy's Czech-addon Adblock list 
 ! Version: 023B Updated: 23 Mar 2010
 ! This list expires after 5 days
@@ -102,6 +102,7 @@ nova.cz##.ad_ttl
 nova.cz##.ad_wrap
 nova.cz##.pr_box
 novinky.cz###adSkyPosition
+securityworld.cz##.banner
 tyden.cz##.reklama
 volny.cz##[style="padding: 4px; font-size: 11px; background-color: rgb(246, 248, 234);"]
 zive.cz###adrtextframe