diff --git a/readme-vars.yml b/readme-vars.yml
index bda6a4d..a3b195e 100644
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -23,6 +23,7 @@ param_env_vars:
 param_usage_include_vols: true
 param_volumes:
   - { vol_path: "/config", vol_host_path: "/path/to/{{ project_name }}/config", desc: "Persistent config files" }
+  - { vol_path: "/var/cache/ddclient", vol_host_path: "/path/to/{{ project_name }}/cache", desc: "ddclient cache files" }
 param_usage_include_ports: false
 param_device_map: false
 cap_add_param: false