diff --git a/bundles/letsencrypt/metadata.py b/bundles/letsencrypt/metadata.py
index 789c544..310dadd 100644
--- a/bundles/letsencrypt/metadata.py
+++ b/bundles/letsencrypt/metadata.py
@@ -26,17 +26,20 @@ defaults = {
 
 
 @metadata_reactor.provides(
-    'cron/jobs/letsencrypt',
+    'systemd-timers/timers/letsencrypt',
 )
 def cron(metadata):
     if node.metadata.get('letsencrypt/domains'):
         return {
-            'cron': {
-                'jobs': {
-                    'letsencrypt': '\n'.join([
-                        '{} 4 * * *    root    /usr/bin/dehydrated --cron --accept-terms --challenge http-01 > /dev/null'.format((node.magic_number % 60)),
-                        '{} 4 * * 0    root    /usr/bin/dehydrated --cleanup > /dev/null'.format((node.magic_number % 60)),
-                    ]),
+            'systemd-timers': {
+                'timers': {
+                    'letsencrypt': {
+                        'command': [
+                            '/usr/bin/dehydrated --cron --accept-terms --challenge http-01',
+                            '/usr/bin/dehydrated --cleanup',
+                        ],
+                        'when': '04:{}:00'.format(node.magic_number % 60),
+                    },
                 },
             },
         }