diff --git a/media.yaml b/media.yaml
index fc6ea59..8b51122 100644
--- a/media.yaml
+++ b/media.yaml
@@ -11,10 +11,13 @@ projects:
     contributor: []
     url: 'https://cdn.door43.org/kn/Door43-Catalog/kn_obs/v4.2/pdf/kn_obs_v4.2.pdf'
   - identifier: 'mp3'
-    version: '1'
-    contributor: []
+    version: '4.2'
+    contributor:
+      - 'Narrator: '
+      - 'Checker: '
+      - 'Engineer: '
     quality:
     - '64kbps'
     - '32kbps'
     chapter_url: 'https://cdn.door43.org/kn/obs/v4.2/{quality}/kn_obs_{chapter}_{quality}.mp3'
-    url: 'https://cdn.door43.org/kn/obs/v4.2/{quality}/kn_obs_v4.2_mp3_{quality}.zip'
\ No newline at end of file
+    url: 'https://cdn.door43.org/kn/obs/v4.2/{quality}/kn_obs_v4.2_mp3_{quality}.zip'