diff --git a/systemd/tarsnap.timer b/systemd/tarsnap.timer
index 6a34e1d..70c9ece 100644
--- a/systemd/tarsnap.timer
+++ b/systemd/tarsnap.timer
@@ -3,6 +3,7 @@
 [Unit]
 Description=Run tarsnap.service every six hours
 Requires=tarsnap.service
+After=network-online.target
 
 [Timer]
 Unit=tarsnap.service