diff --git a/ui/src/hooks/usePiperTts.ts b/ui/src/hooks/usePiperTts.ts
index b2d67488..4baf985d 100644
--- a/ui/src/hooks/usePiperTts.ts
+++ b/ui/src/hooks/usePiperTts.ts
@@ -1,5 +1,5 @@
 import { useState, useCallback, useRef } from "react";
-import { tts } from "@mintplex-labs/piper-tts-web";
+import * as tts from "@mintplex-labs/piper-tts-web";
 
 const DEFAULT_VOICE = "en_US-hfc_female-medium";
 
@@ -36,20 +36,25 @@ export function usePiperTts() {
       audioRef.current = null;
     }
     setStatus("speaking");
+    let objectUrl: string | null = null;
     try {
       const wav = await tts.predict({ text, voiceId: DEFAULT_VOICE });
-      const audio = new Audio(wav);
+      objectUrl = URL.createObjectURL(wav);
+      const audio = new Audio(objectUrl);
       audioRef.current = audio;
-      audio.onended = () => {
-        audioRef.current = null;
-        setStatus("ready");
-      };
-      audio.onerror = () => {
+      const cleanup = () => {
         audioRef.current = null;
+        if (objectUrl) {
+          URL.revokeObjectURL(objectUrl);
+          objectUrl = null;
+        }
         setStatus("ready");
       };
+      audio.onended = cleanup;
+      audio.onerror = cleanup;
       await audio.play();
     } catch {
+      if (objectUrl) URL.revokeObjectURL(objectUrl);
       setStatus("ready");
     }
   }, [status]);