diff --git a/templates/Fedora/34/etc/httpd/conf.d/vhost.conf b/templates/Fedora/34/etc/httpd/conf.d/vhost.conf
index e526e1c..ca9211c 100644
--- a/templates/Fedora/34/etc/httpd/conf.d/vhost.conf
+++ b/templates/Fedora/34/etc/httpd/conf.d/vhost.conf
@@ -3,7 +3,7 @@ MDCertificateProtocol ACME
 MDCAChallenges http-01
 MDDriveMode auto
 MDPrivateKeys RSA 4096
-MDRenewWindow
+MDRenewWindow 33%
 MDStoreDir md
 # MDCertificateAuthority https://acme-v02.api.letsencrypt.org/directory
 # We want staging for now...