diff --git a/css/style.css b/css/style.css
index 170cc2a..45ad6eb 100644
--- a/css/style.css
+++ b/css/style.css
@@ -90,6 +90,7 @@ div.clear {
 }
 
 .notSupported {
+  display: none;
   padding: 1em;
   margin-top: 1em;
   margin-bottom: 1em;
diff --git a/js/script.js b/js/script.js
index 25efdc9..1881a7d 100644
--- a/js/script.js
+++ b/js/script.js
@@ -51,6 +51,10 @@ document.addEventListener("DOMContentLoaded", () => {
     window.addEventListener("error", function (event) {
         console.log("Got an uncaught error: ", event.error);
     });
+    if ("serial" in navigator) {
+        const notSupported = document.getElementById("notSupported");
+        notSupported.classList.add("hidden");
+    }
 
     initBaudRate();
     loadAllSettings();