diff --git a/nixos/hosts/monitoring/default.nix b/nixos/hosts/monitoring/default.nix
index 8729f62..d5f212b 100644
--- a/nixos/hosts/monitoring/default.nix
+++ b/nixos/hosts/monitoring/default.nix
@@ -27,7 +27,7 @@
       enable = true;
       datasources.settings.datasources = [
         {
-          url = "localhost:4000";
+          url = "http://localhost:4000";
           type = "prometheus";
           name = "Prometheus";
         }