diff --git a/roles/service/meta/argument_specs.yaml b/roles/service/meta/argument_specs.yaml
index 569de49..cddd6a4 100644
--- a/roles/service/meta/argument_specs.yaml
+++ b/roles/service/meta/argument_specs.yaml
@@ -69,6 +69,16 @@ argument_specs:
               - Defaults to false for volume and bind, true for template
             type: bool
             required: false
+          user:
+            description: Volume owner uid. Only applicable if mount type is volume.
+            type: str
+            required: false
+            default: ""
+          group:
+            description: Volume owner gid. Only applicable if mount type is volume.
+            type: str
+            required: false
+            default: ""
       service_container_secrets:
         description: A list of secrets available to the service container in /run/secrets/<service name>-<secret name>
         type: list