diff --git a/.env.local.example b/.env.local.example
index d636ff1..fdb1671 100644
--- a/.env.local.example
+++ b/.env.local.example
@@ -1,2 +1,6 @@
+NEXT_PUBLIC_ASSET_JACKET_EXTENSION=.webp
+NEXT_PUBLIC_ASSET_IMAGE_EXTENSION=.webp
+NEXT_PUBLIC_ASSET_MUSIC_EXTENSION=.opus
+NEXT_PUBLIC_ASSET_AUDIO_EXTENSION=.opus
 DATABASE_URL=mysql://aime:aime@127.0.0.1:3306/aime
 NEXTAUTH_SECRET=[insert_random_string_here]