diff --git a/deployments/ssl/certmanager.yaml b/deployments/ssl/certmanager.yaml
index 281a971..12c3ecf 100644
--- a/deployments/ssl/certmanager.yaml
+++ b/deployments/ssl/certmanager.yaml
@@ -42,8 +42,7 @@ spec:
     solvers:
     - dns01:
         rfc2136:
-          nameservers:
-            - hawke.hxst.com.au:53
+          nameservers: hawke.hxst.com.au:53
           tsigKeyName: "hxme-update-key"
           tsigAlgorithm: HMACSHA512
           tsigSecretSecretRef: