diff --git a/chrony.conf b/chrony.conf
index 5ca0277..7e3690b 100644
--- a/chrony.conf
+++ b/chrony.conf
@@ -1,11 +1,19 @@
 # Use public servers from the pool.ntp.org project.
 # Please consider joining the pool (http://www.pool.ntp.org/join.html).
-server 0.fedora.pool.ntp.org
-server 1.fedora.pool.ntp.org
-server 2.fedora.pool.ntp.org
+server 0.fedora.pool.ntp.org iburst
+server 1.fedora.pool.ntp.org iburst
+server 2.fedora.pool.ntp.org iburst
+server 3.fedora.pool.ntp.org iburst
 
+# Ignore stratum in source selection.
+stratumweight 0
+
+# Record the rate at which the system clock gains/losses time.
 driftfile /var/lib/chrony/drift
 
+# Enable kernel RTC synchronization.
+rtcsync
+
 # In first three updates step the system clock instead of slew
 # if the adjustment is larger than 100 seconds.
 makestep 100 3