diff --git a/services/grafana/default.nix b/services/grafana/default.nix
index 6bcaa80..509a4fc 100644
--- a/services/grafana/default.nix
+++ b/services/grafana/default.nix
@@ -228,6 +228,6 @@ in
     };
 
     # Open ports in the firewall.
-    networking.firewall.allowedTCPPorts = [ 3000 3100 3101 9001 1514 514 ];
+    networking.firewall.allowedTCPPorts = [ 3000 3100 3101 8086 9001 1514 514 ];
   };
 }