diff --git a/modules/networking.nix b/modules/networking.nix
index c0b179a..744bcb3 100644
--- a/modules/networking.nix
+++ b/modules/networking.nix
@@ -52,4 +52,9 @@
     openFirewall = false;
     startWhenNeeded = true;
   };
+
+  # Firewall configuration
+  networking.firewall.allowedTCPPorts = [
+    9090 # Calibre
+  ];
 }