diff --git a/upgrade_roundcube.sh b/upgrade_roundcube.sh
index eddb024..161e09d 100755
--- a/upgrade_roundcube.sh
+++ b/upgrade_roundcube.sh
@@ -656,6 +656,23 @@ else
 	fatal "$(cat $log_file)"
 fi
 
+
+echo ""
+echo ""
+echo "You might want to deactivate some plugins in the configuration file, e.g. the plugin 'carddav'.."
+echo ""
+
+echononl "continue [yes/no]: "
+read OK
+OK="$(echo "$OK" | tr '[:upper:]' '[:lower:]')"
+while [[ "$OK" != "yes" ]] && [[  "$OK" != "no" ]] ; do
+   echononl "Wrong entry! - repeat [yes/no]: "
+   read OK
+done
+[[ $OK = "yes" ]] || fatal "Abbruch durch User"
+
+
+
 echononl "   Update dependencies by running 'php composer.phar update --no-dev'"
 php composer.phar --no-interaction update --no-dev > ${script_dir}/log/update_roundcube-${ROUNDCUBE_VERSION}-dependencies.${backup_date}.log 2>&1
 if [[ $? -eq 0 ]]; then