diff --git a/ansible/roles/apps/tasks/cert-manager.yml b/ansible/roles/apps/tasks/cert-manager.yml
index ef149e099c213424f5400c8e84b8ab44ff372a7d..bdb1feb7f7c39111340cb3257a229dbb92fa4e91 100644
--- a/ansible/roles/apps/tasks/cert-manager.yml
+++ b/ansible/roles/apps/tasks/cert-manager.yml
@@ -2,7 +2,8 @@
 - name: Install CRDs for cert-manager
   tags:
     - cert-manager
-  command: '/snap/bin/kubectl apply -f https://raw.githubusercontent.com/jetstack/cert-manager/v{{ cert_manager.crd_version }}/deploy/manifests/00-crds.yaml'
+  # TODO: Remove `--validate=false` once we use Kubernetes 1.16 or above
+  command: '/snap/bin/kubectl apply --validate=false -f https://raw.githubusercontent.com/jetstack/cert-manager/v{{ cert_manager.crd_version }}/deploy/manifests/00-crds.yaml'
 
 - name: Prevent validation deadlock for cert-manager
   tags:
diff --git a/helmfiles/helmfile.d/05-cert-manager.yaml b/helmfiles/helmfile.d/05-cert-manager.yaml
index 6b75e33e96129a4985eac4daf27376109e25fbfc..94eb17daa7564a689cb7260952cd8891b6174ff3 100644
--- a/helmfiles/helmfile.d/05-cert-manager.yaml
+++ b/helmfiles/helmfile.d/05-cert-manager.yaml
@@ -11,7 +11,7 @@ releases:
   - name: "oas-{{ .Environment.Values.releaseName }}-cert-manager"
     namespace: "cert-manager"
     chart: "jetstack/cert-manager"
-    version: "0.9.1"
+    version: "0.11.0"
     values:
     - "../values/cert-manager.yaml.gotmpl"
     wait: false