diff --git a/start.letsencrypt.sh b/start.letsencrypt.sh
index 3bce929..b1b55c4 100755
--- a/start.letsencrypt.sh
+++ b/start.letsencrypt.sh
@@ -28,7 +28,7 @@ else
 		DOMAIN=$(jq -r .DOMAIN $i) ;
 		if [[ -f /acme.sh/$DOMAIN/key.pem && -f /acme.sh/$DOMAIN/fullchain.pem && -f /acme.sh/$DOMAIN/cert.pem ]] ; then
 			start_letsencrypt ;
-			if [ find /acme.sh/$DOMAIN/ -type f -newermt "$(date '+%Y-%m-%d %H:%M:%S' -d '1 hour ago')" ]; then 
+			if [ find /acme.sh/$DOMAIN/ -type f -mmin +60 ]; then 
 				touch /acme.sh/$DOMAIN/renew_certificate;
 			fi
 		else