diff --git a/doc/accesslist-duplicates.d/01-example.avif b/doc/accesslist-duplicates.d/01-example.avif
new file mode 100644
index 0000000..9b26451
Binary files /dev/null and b/doc/accesslist-duplicates.d/01-example.avif differ
diff --git a/doc/accesslist-duplicates.d/01-example.png b/doc/accesslist-duplicates.d/01-example.png
deleted file mode 100644
index 0922984..0000000
Binary files a/doc/accesslist-duplicates.d/01-example.png and /dev/null differ
diff --git a/doc/accesslist-duplicates.md b/doc/accesslist-duplicates.md
index 64a5fea..e052c20 100644
--- a/doc/accesslist-duplicates.md
+++ b/doc/accesslist-duplicates.md
@@ -33,7 +33,7 @@ Run this script from a terminal:
 
     / system script run accesslist-duplicates.local;
 
-![screenshot: example](accesslist-duplicates.d/01-example.png)
+![screenshot: example](accesslist-duplicates.d/01-example.avif)
 
 See also
 --------