diff --git a/inc/certs.inc b/inc/certs.inc
index d15ed451..a3b63a0b 100755
--- a/inc/certs.inc
+++ b/inc/certs.inc
@@ -691,7 +691,7 @@ export PDNS_Ttl=60
 		if [ ! -d ${NM_VC_ACMEFOLDER}/${NM_VC_HOSTNAME} ];then
 			echo -e "\n${idsCL[LightGreen]}Requesting new certificate ...${idsCL[Default]}\n"
 			echo "export PDNS_ServerId='localhost'" >> /tmp/vcenter-update-ssl.sh
-			echo "${NM_VC_ACMEFOLDER}/${NM_VC_ACMESCRIPT} --server letsencrypt -k 2048 --preferred-chain 'ISRG Root X1' --issue --dns dns_pdns -d ${NM_VC_HOSTNAME}" >> /tmp/vcenter-update-ssl.sh
+			echo "${NM_VC_ACMEFOLDER}/${NM_VC_ACMESCRIPT} --server letsencrypt -k 2048 --preferred-chain 'ISRG Root X1' --keylength ec-256 --issue --dns dns_pdns -d ${NM_VC_HOSTNAME}" >> /tmp/vcenter-update-ssl.sh
 		else
 			echo -e "\n${idsCL[LightGreen]}Renewing certificate ...${idsCL[Default]}\n"
 			if [ "${1}" == "force" ]; then