diff --git a/kubernetes/apps/cert-manager/cert-manager/issuers/dnsimple/issuer-zerossl-prod.yaml b/kubernetes/apps/cert-manager/cert-manager/issuers/dnsimple/issuer-zerossl-prod.yaml
index 5ae5ba45..d527f9dd 100644
--- a/kubernetes/apps/cert-manager/cert-manager/issuers/dnsimple/issuer-zerossl-prod.yaml
+++ b/kubernetes/apps/cert-manager/cert-manager/issuers/dnsimple/issuer-zerossl-prod.yaml
@@ -8,7 +8,6 @@ spec:
   acme:
     server: https://acme.zerossl.com/v2/DV90
     email: "joe@veri.dev"
-    preferredChain: ""
     privateKeySecretRef:
       name: zerossl-production
     externalAccountBinding: