diff --git a/nixos/caddy.nix b/nixos/caddy.nix
index b28c6c8..a70f9f4 100644
--- a/nixos/caddy.nix
+++ b/nixos/caddy.nix
@@ -10,7 +10,9 @@
       extraConfig = ''
         respond "Hello, world!"
       '';
-      listen = [ ":9091" ];
+      listenAddresses = [
+        "0.0.0.0:9091"
+      ];
     };
   };
 }