diff --git a/static/app.js b/static/app.js
index b43f08e..0ef3d6e 100644
--- a/static/app.js
+++ b/static/app.js
@@ -59,12 +59,17 @@ function addBubble(text, role = "assistant") {
 
 async function unlockAudio() {
   if (audioUnlocked) return;
-  const audio = new Audio();
-  audio.muted = true;
   try {
-    await audio.play();
+    const AudioContext = window.AudioContext || window.webkitAudioContext;
+    if (AudioContext) {
+      const context = new AudioContext();
+      if (context.state === "suspended") {
+        await context.resume();
+      }
+      await context.close();
+    }
   } catch {
-    // Mobile browsers only need the attempt to happen inside a tap handler.
+    // The click itself is enough to authorize later playback in most browsers.
   }
   audioUnlocked = true;
 }
@@ -97,6 +102,7 @@ async function sendText() {
 }
 
 async function toggleVoice() {
+  setStatus("Activation du micro", "live");
   await unlockAudio();
 
   if (!navigator.mediaDevices || !navigator.mediaDevices.getUserMedia) {
diff --git a/static/index.html b/static/index.html
index df3e6d0..8a08def 100644
--- a/static/index.html
+++ b/static/index.html
@@ -50,6 +50,6 @@
       </section>
     </main>
 
-    <script src="/app.js" type="module"></script>
+    <script src="/app.js?v=4" type="module"></script>
   </body>
 </html>
diff --git a/static/sw.js b/static/sw.js
index c1aa375..98263ee 100644
--- a/static/sw.js
+++ b/static/sw.js
@@ -1,8 +1,8 @@
-const CACHE_NAME = "opensquared-assistant-v3";
+const CACHE_NAME = "opensquared-assistant-v4";
 const ASSETS = [
   "/",
   "/styles.css",
-  "/app.js",
+  "/app.js?v=4",
   "/manifest.webmanifest",
   "/icons/icon-v2.svg"
 ];