diff --git a/apps/base/infra/cert-manager.yaml b/apps/base/infra/cert-manager.yaml
index 423f330..21d5495 100644
--- a/apps/base/infra/cert-manager.yaml
+++ b/apps/base/infra/cert-manager.yaml
@@ -15,7 +15,7 @@ spec:
       # Weg: 1.15.5 -> 1.16.5 -> 1.17.4 -> 1.18.6 -> 1.19.6 -> 1.20.3 -> 1.21.1
       # Am Zielimage gemessen: v1.14.0 traegt 8 CRITICAL und 128 HIGH ueber die
       # drei Images, v1.21.1 traegt 0 und 24.
-      version: "v1.20.3"
+      version: "v1.21.1"
       sourceRef:
         kind: HelmRepository
         name: jetstack