diff --git a/check_remote_websites.sh b/check_remote_websites.sh
index 236ad60..4437198 100755
--- a/check_remote_websites.sh
+++ b/check_remote_websites.sh
@@ -204,7 +204,10 @@ if [[ -n "$WEBSITES_TO_CHECK" ]] ; then
       while [[ $i -lt 3 ]] ; do 
          response="$(curl --max-time $TIME_OUT --connect-timeout 30 \
                      -I -k -L --write-out %{http_code} --silent --output /dev/null $_site 2> ${LOCK_DIR}/err.msg)"
-         if [[ "$response" -eq 200 ]]; then
+
+         # 200 - OK
+         # 401 - Unauthorized (response of roundcube webmailer (since version 1.4)
+         if [[ "$response" -eq 200 ]] || [[ "$response" -eq 401 ]]; then
             echo_ok
             _success=true
             break