diff --git a/examples/imagemagick/scyllaridae.yml b/examples/imagemagick/scyllaridae.yml
index 74404e5..6e71b47 100644
--- a/examples/imagemagick/scyllaridae.yml
+++ b/examples/imagemagick/scyllaridae.yml
@@ -13,4 +13,6 @@ cmdByMimeType:
     args:
       - "-"
       - "%args"
-      - "image:-"
+      - "-format"
+      - "%destination-mime-ext"
+      - "-"