diff --git a/README.md b/README.md
index d06044d..18ac2c5 100644
--- a/README.md
+++ b/README.md
@@ -136,6 +136,10 @@ Added support for nginx webserver, based on official nginx image
 
 - change renew_cert.sh file name for run-parts
 
+### 1.1.5
+
+- update renew_cert.sh for periodic renew
+
 ## Kubernetes
 
 See https://code.ungleich.ch/ungleich-public/ungleich-k8s/.
diff --git a/renew_cert.sh b/renew_cert.sh
index d7e6148..a9e079e 100755
--- a/renew_cert.sh
+++ b/renew_cert.sh
@@ -2,9 +2,10 @@
 
 if [ "$NO_NGINX" ]; then
     /usr/bin/certbot renew --standalone
+elif [ -n "`grep -r standalone /etc/letsencrypt/renewal`" ]; then
+    /usr/bin/certbot renew --force-renew --webroot --webroot-path /www_http
 else
     /usr/bin/certbot renew --webroot --webroot-path /www_http
-
 fi
 
 # Correct permissions if not told otherwise