diff --git a/config.yaml b/config.yaml
index 2e04162..2ccdd9b 100644
--- a/config.yaml
+++ b/config.yaml
@@ -142,4 +142,7 @@ chroot_commands:
   # Force --cloud-provider=external
   - "sed -i 's/command_args=\"/command_args=\"--cloud-provider=external /' /etc/init.d/kubelet"
 
+  # Configure chrony
+  - 'echo "server ptbtime1.ptb.de iburst\nserver ptbtime2.ptb.de iburst\ninitstepslew 10 ptbtime1.ptb.de\ndriftfile /var/lib/chrony/chrony.drift\nrtcsync\ncmdport 0" >/etc/chrony/chrony.conf'
+
 ...