diff --git a/playbook.yml b/playbook.yml
index 901007f..a2231b0 100644
--- a/playbook.yml
+++ b/playbook.yml
@@ -223,7 +223,7 @@
         create_namespace: yes
         wait: yes
         kubeconfig: "{{ kubeconfig.path }}"
-        values: "{{ item.values | default({}) }}"
+        values: item.values | default('omit')
       loop:
         - name: cert-manager
           ref: jetstack/cert-manager