diff --git a/defaults/main.yml b/defaults/main.yml
index 943cbb4..4846c6d 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -178,7 +178,7 @@ self_signed_subject: "/CN={{ ansible_fqdn }} self signed"
 mkcert_create_certificate: false
 mkcert_cert_name: "{{ ansible_fqdn}}.pem"
 mkcert_key_name: "{{ ansible_fqdn}}-key.pem"
-mkcert_dsn_and_ip_list: "{{ ansible_fqdn }} {{ ansible_default_ipv4 }}"
+mkcert_dsn_and_ip_list: "{{ ansible_fqdn }} {{ ansible_default_ipv4.address }}"
 mkcert_ca_host: localhost
 
 trusted_ca_el_anchors_path: '/etc/pki/ca-trust/source/anchors'