diff --git a/flake.nix b/flake.nix
index 9992d0a..7ea9993 100644
--- a/flake.nix
+++ b/flake.nix
@@ -76,19 +76,19 @@
           };
           tcpPort = lib.mkOption {
             type = lib.types.port;
-            default = "1027";
+            default = 1027;
             description = "The TCP port to host the server on";
           };
           udpPort = lib.mkOption {
             type = lib.types.port;
-            default = "1027";
+            default = 1027;
             description = "The UDP port to host the server on";
           };
           proximity = {
             type = lib.types.attrs;
             port = lib.mkOption {
               type = lib.types.port;
-              example = "4433";
+              example = 4433;
               description = "The UDP port to host the proximity chat server on";
             };
             certPath = lib.mkOption {
@@ -113,7 +113,7 @@
               Type = "simple";
               ExecStart = let
                 proxRes = 5;
-              in ''${self.packages.${system}.default}/bin/smo-server -t ${tcpPort} -u ${udpPort}'';
+              in ''${self.packages.${system}.default}/bin/smo-server -t ${toString tcpPort} -u ${toString udpPort}'';
             };
           };
         };