diff --git a/assets/images/alps-keycaps.jpg b/assets/images/alps-keycaps.jpg
deleted file mode 100644
index 34e73e2..0000000
Binary files a/assets/images/alps-keycaps.jpg and /dev/null differ
diff --git a/assets/images/alps-keycaps.webp b/assets/images/alps-keycaps.webp
new file mode 100644
index 0000000..befdc95
Binary files /dev/null and b/assets/images/alps-keycaps.webp differ
diff --git a/config/_default/params.toml b/config/_default/params.toml
index 248851f..3ba2a4a 100644
--- a/config/_default/params.toml
+++ b/config/_default/params.toml
@@ -18,7 +18,7 @@ disableImageOptimization = false
 disableTextInHeader = false
 
 # non-animated background
-defaultBackgroundImage = "/images/alps-keycaps.jpg"
+defaultBackgroundImage = "/images/alps-keycaps.webp"
 
 defaultFeaturedImage = "/img/featured.svg"