diff --git a/episodes/12-secret-society.html b/episodes/12-secret-society.html
index e1a936c..3549f02 100644
--- a/episodes/12-secret-society.html
+++ b/episodes/12-secret-society.html
@@ -9,7 +9,7 @@
 <html lang="en">
  <body>
  
-  <audio controls><source src="https://oceanwinder-files.vickysteeves.com/Episodes/episode12.m4a" type="audio/mpeg">Your browser does not support the audio element.</audio><br/>
+  <audio controls><source src="https://oceanwinder-files.vickysteeves.com/Episodes/episode12.mp3" type="audio/mpeg">Your browser does not support the audio element.</audio><br/>
   
   <p><a href="https://oceanwinder-files.vickysteeves.com/Notes/episode12.pdf">Read the notes</a></p>
 
diff --git a/episodes/13-hydra.html b/episodes/13-hydra.html
index 281640a..c3a6717 100644
--- a/episodes/13-hydra.html
+++ b/episodes/13-hydra.html
@@ -9,7 +9,7 @@
 <html lang="en">
  <body>
  
-  <audio controls><source src="https://oceanwinder-files.vickysteeves.com/Episodes/episode13.m4a" type="audio/mpeg">Your browser does not support the audio element.</audio><br/>
+  <audio controls><source src="https://oceanwinder-files.vickysteeves.com/Episodes/episode13.mp3" type="audio/mpeg">Your browser does not support the audio element.</audio><br/>
   
   <p><a href="https://oceanwinder-files.vickysteeves.com/Notes/episode13.pdf">Read the notes</a></p>
 
diff --git a/episodes/14-family.html b/episodes/14-family.html
index 0f9cdcd..b0438c7 100644
--- a/episodes/14-family.html
+++ b/episodes/14-family.html
@@ -9,7 +9,7 @@
 <html lang="en">
  <body>
  
-  <audio controls><source src="https://oceanwinder-files.vickysteeves.com/Episodes/episode14.m4a" type="audio/mpeg">Your browser does not support the audio element.</audio><br/>
+  <audio controls><source src="https://oceanwinder-files.vickysteeves.com/Episodes/episode14.mp3" type="audio/mpeg">Your browser does not support the audio element.</audio><br/>
   
   <p><a href="https://oceanwinder-files.vickysteeves.com/Notes/episode14.pdf">Read the notes</a></p>
 
