diff --git a/files/chrony.conf b/files/chrony.conf
index 3971bfcdd883451fd06e55c9c26d4f9355b1aa09..464b20e454bbc2f3efbc9fcf9ab05d0a188118fd 100644
--- a/files/chrony.conf
+++ b/files/chrony.conf
@@ -1,9 +1,13 @@
 server gbg1.ntp.se iburst
 server gbg2.ntp.se iburst
+server lul1.ntp.se iburst
+server lul2.ntp.se iburst
 server mmo1.ntp.se iburst
 server mmo2.ntp.se iburst
 server sth1.ntp.se iburst
 server sth2.ntp.se iburst
+server sth3.ntp.se iburst
+server sth4.ntp.se iburst
 server svl1.ntp.se iburst
 server svl2.ntp.se iburst
 server timehost.lysator.liu.se iburst