diff --git a/deployments/ssl/certmanager.yaml b/deployments/ssl/certmanager.yaml
index dc37aa5..2daccc3 100644
--- a/deployments/ssl/certmanager.yaml
+++ b/deployments/ssl/certmanager.yaml
@@ -43,7 +43,7 @@ spec:
     - dns01:
         rfc2136:
           nameserver: hawke.hxst.com.au:53
-          tsigKeyName: hxme-update-key
+          tsigKeyName: "hxme-update-key"
           tsigAlgorithm: "hmac-sha512"
           tsigSecretSecretRef:
             name: hxme-update-key