diff --git a/nginx/conf.d/default.conf b/nginx/conf.d/default.conf
index c67b44e..8714036 100644
--- a/nginx/conf.d/default.conf
+++ b/nginx/conf.d/default.conf
@@ -13,7 +13,7 @@ server {
 
     # ---------- Audio (and optional video) ----------
     # 30-day cache; adjust max-age as needed.
-    location ~ \.(opus|ogg|mp3|flac|wav|m4a|aac|mp4|webm)$ {
+    location ~* \.(opus|flac|ogg|mp3|wav|m4a|aac)$ {
         add_header Cache-Control "public, max-age=2592000" always;
 
         # Teach Nginx any MIME types it doesn’t already know: