diff --git a/config/rootfiles/core/145/update.sh b/config/rootfiles/core/145/update.sh
index 9ff64f7f9..c8cf12224 100644
--- a/config/rootfiles/core/145/update.sh
+++ b/config/rootfiles/core/145/update.sh
@@ -66,6 +66,10 @@ rm /etc/rc.d/rc6.d/K45random
 mv /etc/rc.d/rc3.d/S00random /etc/rc.d/rcsysinit.d/S66random
 mv /etc/rc.d/rcsysinit.d/S92rngd /etc/rc.d/rcsysinit.d/S65rngd
 
+# remove converted urlfilter database to force rebuilt
+rm -f /var/ipfire/urlfilter/blacklists/*/*.db
+rm -f /var/ipfire/urlfilter/blacklists/custom/*/*.db
+
 # remove packages that are included now in core
 for package in perl-DBI perl-DBD-SQLite; do
         rm -f /opt/pakfire/db/installed/meta-$package