diff --git a/editions/tw5.com/tiddlers/images/New Release Banner.png b/editions/tw5.com/tiddlers/images/New Release Banner.png
deleted file mode 100644
index 7c2cb16c23..0000000000
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diff --git a/editions/tw5.com/tiddlers/images/New Release Banner.webp b/editions/tw5.com/tiddlers/images/New Release Banner.webp
new file mode 100644
index 0000000000..97835f8fa8
Binary files /dev/null and b/editions/tw5.com/tiddlers/images/New Release Banner.webp differ
diff --git a/editions/tw5.com/tiddlers/images/New Release Banner.png.meta b/editions/tw5.com/tiddlers/images/New Release Banner.webp.meta
similarity index 88%
rename from editions/tw5.com/tiddlers/images/New Release Banner.png.meta
rename to editions/tw5.com/tiddlers/images/New Release Banner.webp.meta
index 2da8dc356c..8ef034e0ce 100644
--- a/editions/tw5.com/tiddlers/images/New Release Banner.png.meta	
+++ b/editions/tw5.com/tiddlers/images/New Release Banner.webp.meta	
@@ -1,4 +1,4 @@
 title: New Release Banner
-type: image/png
+type: image/webp
 tags: picture
 alt-text: Release banner, with a custom background and a release version in big letters.