diff --git a/data/www/index.html b/data/www/index.html
index 3a8283d..f5c43b7 100644
--- a/data/www/index.html
+++ b/data/www/index.html
@@ -23,7 +23,7 @@
     </div>
 
     <form class="w3-margin w3-center w3-card w3-padding-24" action="/upload" method="POST" enctype="multipart/form-data">
-        <input type="file" accept="audio/*" name="file">
+        <input type="file" accept=".mp3,.wav" name="file">
         <input type="submit" class="w3-button w3-blue">
     </form>
 
diff --git a/src/main.cpp b/src/main.cpp
index 326dc85..b3f529a 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -58,7 +58,7 @@ byte currentVolume = 12;
 
 bool fileIsValid(String fileName)
 {
-  return !fileName.startsWith(".") && (fileName.endsWith(".mp3") || fileName.endsWith(".aac") || fileName.endsWith(".wav"));
+  return !fileName.startsWith(".") && (fileName.endsWith(".mp3") || fileName.endsWith(".wav"));
 }
 
 void clearMessageArea()