diff --git a/etc/systemd/system/tcp-fastopen-rotate-keys.timer b/etc/systemd/system/tcp-fastopen-rotate-keys.timer
index c6e4bbf..fbd3c83 100644
--- a/etc/systemd/system/tcp-fastopen-rotate-keys.timer
+++ b/etc/systemd/system/tcp-fastopen-rotate-keys.timer
@@ -2,6 +2,7 @@
 Description=Run tcp-fastopen-rotate-keys daily
 
 [Timer]
+AccuracySec=1us
 OnCalendar=daily UTC
 Persistent=true