diff --git a/README.md b/README.md
index 5ac8b5a..4689ce2 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ Inventory example:
     
     cacert_group_certs:
       - name: mygroupcert
-        host_groups:
+        append_groups:
           - consul
           - patroni
         hosts:
diff --git a/tasks/group_certs.yaml b/tasks/group_certs.yaml
index 5a06ca9..df721f8 100644
--- a/tasks/group_certs.yaml
+++ b/tasks/group_certs.yaml
@@ -4,7 +4,7 @@
     - name: Generate subject_alt_ips
       set_fact:
         client_subject_alt_ips: "{{ groups[group_item] | map('extract', hostvars, ['ansible_host']) | map('regex_replace', '^', 'IP:') | list }}"
-      loop: "{{ item.host_groups }}"
+      loop: "{{ item.append_groups }}"
       loop_control:
         loop_var: group_item
       when:
@@ -16,7 +16,7 @@
     - name: Generate subject_alt_names
       set_fact:
         client_subject_alt_names: "{{ groups[group_item] | map('extract', hostvars, ['inventory_hostname']) | map('regex_replace', '^', 'DNS:') | list }}"
-      loop: "{{ item.host_groups }}"
+      loop: "{{ item.append_groups }}"
       loop_control:
         loop_var: group_item
       when: