diff --git a/flake.nix b/flake.nix
index 03afdb6..f94161d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -27,7 +27,7 @@
             git
             go
             hugo
-            imagemagick
+            libwebp
             nodejs-16_x
             yarn
           ];
diff --git a/scripts/pngtowebp.sh b/scripts/pngtowebp.sh
index 2ebdff1..6b21a0f 100755
--- a/scripts/pngtowebp.sh
+++ b/scripts/pngtowebp.sh
@@ -2,5 +2,5 @@
 
 set -euxo pipefail
 
-fd -tf png$ static/uploads -x convert {} -quality 100 -define webp:lossless=true {.}.webp
+fd -tf png$ static/uploads -x cwebp -lossless -mt {} -o {.}.webp
 fd -tf png$ static/uploads -X rm -v