diff --git a/config.json b/config.json
index 7710b7f..135fd37 100644
--- a/config.json
+++ b/config.json
@@ -22,6 +22,11 @@
         "default": "random",
         "description": "specifies the color to change to"
       },
+      "index": {
+        "available": "number values",
+        "default": "undefined",
+        "description": "specifies the led index"
+      },
       "duration": {
         "available": "number values",
         "default": 1000,
diff --git a/libs/server.js b/libs/server.js
index 7fe3e9f..56c7dce 100644
--- a/libs/server.js
+++ b/libs/server.js
@@ -44,13 +44,16 @@ function getHTML() {
         "<th>argument</th>" +
         "<th>available values</th>" +
         "<th>default</th>" +
+        "<th>restrictions</th>" +
         "<th>description</th>";
     Object.keys(config.api.post).forEach(function (argument) {
+        let restrictions = config.api.post[argument].restrictions || "";
         welcomeMessage +=
             "<tr>" +
             "<td>" + argument + "</td>" +
             "<td>" + config.api.post[argument].available + "</td>" +
             "<td>" + config.api.post[argument].default + "</td>" +
+            "<td>" + restrictions + "</td>" +
             "<td>" + config.api.post[argument].description + "</td>" +
             "</tr>";
     });