diff --git a/hosts/tyo0/services/prometheus.nix b/hosts/tyo0/services/prometheus.nix
index d05401b..813e980 100644
--- a/hosts/tyo0/services/prometheus.nix
+++ b/hosts/tyo0/services/prometheus.nix
@@ -9,6 +9,7 @@
     enable = true;
     listenAddress = "127.0.0.1";
     port = 9090;
+    webExternalUrl = "https://prom.ny4.dev";
 
     exporters.blackbox = {
       enable = true;