diff --git a/config/system.yaml b/config/system.yaml
index 558b5bc..35b6dbf 100644
--- a/config/system.yaml
+++ b/config/system.yaml
@@ -76,7 +76,13 @@ pages:
     - rss
     - atom
   append_url_extension: null
-  expires: 604800
+  # expires: 0 → Cache-Control: max-age=0, so the browser (and any CDN) revalidates
+  # each load instead of serving up to 7 days stale. With etag on, an unchanged
+  # page returns a cheap 304; an edited/deleted/new entry shows immediately. This
+  # matters because the owner edits the live site and entry media reuses filenames
+  # (photo-N.jpg) across reorders. Server-side page cache (cache.enabled) is
+  # unaffected and still does the heavy lifting.
+  expires: 0
   cache_control: null
   last_modified: false
   etag: true