diff --git a/roles/certsync/defaults/main.yml b/roles/certsync/defaults/main.yml
index a0ceb3a..5583c0a 100644
--- a/roles/certsync/defaults/main.yml
+++ b/roles/certsync/defaults/main.yml
@@ -1,5 +1,4 @@
 ---
 certsync_dir: /etc/ssl/certsync
-certsync_host: srv02.hamburg.freifunk.net
+certsync_host: srv01.hamburg.freifunk.net
 certsync_key: /root/.ssh/certsync
-certsync_script: /usr/local/sbin/certsync
diff --git a/roles/certsync/tasks/main.yml b/roles/certsync/tasks/main.yml
index 00d886e..bff0f13 100644
--- a/roles/certsync/tasks/main.yml
+++ b/roles/certsync/tasks/main.yml
@@ -7,18 +7,24 @@
 
 - name: template certsync script
   template:
-    src: templates/certsync.j2
-    dest: "{{ certsync_script }}"
+    src: certsync
+    dest: /usr/local/sbin/
     owner: root
     group: staff
     mode: 0550
   tags: certsync
 
-- name: create cronjob
-  cron:
-    name: TLS Zertifikate synchronisieren
-    job: "{{ certsync_script }}"
-    minute: "0"
-    hour: "7"
-    weekday: "1"
-  tags: certsync
+- name: template certsync timer
+  template:
+    src: "{{ item }}"
+    dest: /lib/systemd/system/
+  with_items:
+    - certsync.service
+    - certsync.timer
+
+- name: enable certsync timer
+  systemd:
+    name: certsync.timer
+    state: started
+    enabled: yes
+    daemon_reload: yes
diff --git a/roles/certsync/templates/certsync.j2 b/roles/certsync/templates/certsync
similarity index 92%
rename from roles/certsync/templates/certsync.j2
rename to roles/certsync/templates/certsync
index 3dc2787..3af20c8 100755
--- a/roles/certsync/templates/certsync.j2
+++ b/roles/certsync/templates/certsync
@@ -19,5 +19,5 @@ chmod 440 $CERT_DIR/*
 
 COUNT=$(find $CERT_DIR -mtime -7 | wc -l)
 if [ $COUNT -gt 0 ]; then
-  service nginx reload > /dev/null
+  systemctl reload nginx > /dev/null
 fi
diff --git a/roles/certsync/templates/certsync.service b/roles/certsync/templates/certsync.service
new file mode 100644
index 0000000..aa4aa34
--- /dev/null
+++ b/roles/certsync/templates/certsync.service
@@ -0,0 +1,6 @@
+[Unit]
+Description=Synchronize TLS certificates from {{ certsync_host }}
+
+[Service]
+Type=oneshot
+ExecStart=/usr/local/sbin/certsync
diff --git a/roles/certsync/templates/certsync.timer b/roles/certsync/templates/certsync.timer
new file mode 100644
index 0000000..df98dc7
--- /dev/null
+++ b/roles/certsync/templates/certsync.timer
@@ -0,0 +1,10 @@
+[Unit]
+Description=Weekly certsync run
+
+[Timer]
+OnCalendar=Mon *-*-* 05:00
+RandomizedDelaySec=60m
+Persistent=true
+
+[Install]
+WantedBy=timers.target