diff --git a/nixos/modules/services/web-apps/cryptpad.nix b/nixos/modules/services/web-apps/cryptpad.nix
index 0ec6df1419bb..4a38d9589678 100644
--- a/nixos/modules/services/web-apps/cryptpad.nix
+++ b/nixos/modules/services/web-apps/cryptpad.nix
@@ -75,12 +75,12 @@ in
             description = "Address on which the Node.js server should listen";
           };
           httpPort = mkOption {
-            type = types.int;
+            type = types.port;
             default = 3000;
             description = "Port on which the Node.js server should listen";
           };
           websocketPort = mkOption {
-            type = types.int;
+            type = types.port;
             default = 3003;
             description = "Port for the websocket that needs to be separate";
           };