diff --git a/applications/prometheus.nix b/applications/prometheus.nix
index 7c53f77..cd0dfcc 100644
--- a/applications/prometheus.nix
+++ b/applications/prometheus.nix
@@ -43,7 +43,7 @@ in {
     };
   };
 
-  config =
+  config = mkMerge [
     {
       services.prometheus.exporters.node = {
         enable = true;
@@ -52,7 +52,7 @@ in {
         port = cfg.port_collecter;
       };
     }
-    // mkIf cfg.server.enable {
+    (mkIf cfg.server.enable {
       services.prometheus = {
         enable = true;
         port = cfg.server.port;
@@ -67,5 +67,6 @@ in {
           }
         ];
       };
-    };
+    })
+  ];
 }