diff --git a/app/matrix/lib/matrix-ng.libsonnet b/app/matrix/lib/matrix-ng.libsonnet
index 037da0f..18120f0 100644
--- a/app/matrix/lib/matrix-ng.libsonnet
+++ b/app/matrix/lib/matrix-ng.libsonnet
@@ -365,7 +365,7 @@
         metadata+: {
             annotations+: {
                 "kubernetes.io/tls-acme": "true",
-                "certmanager.k8s.io/cluster-issuer": "letsencrypt-prod",
+                "cert-manager.io/cluster-issuer": "letsencrypt-prod",
                 "nginx.ingress.kubernetes.io/proxy-body-size": "0",
                 "nginx.ingress.kubernetes.io/use-regex": "true",
             },