diff --git a/README.md b/README.md
index 56c6bdd..4d7571a 100644
--- a/README.md
+++ b/README.md
@@ -104,7 +104,7 @@ obj="{{ job.kind }}"
 
 `outline` - A boolean attribute that changes the style of the badge to an outline.
 
-`glossy` - A boolean attribute that adds a subtle gradient highlight to the badge. Works with both solid and outline variants; solid badges get a white-tinted radial sheen, outlined badges get a faint colour-tinted version.
+`glossy` - A boolean attribute that adds a gradient sheen to the badge. Cannot be combined with `outline` — passing both will throw an exception.
 
 `icon` - Render an icon to the left of the label. Pass an [Iconify](https://iconify.design) name (e.g. `icon="material-symbols:add-alert"`) to use a specific icon, or pass it as a boolean (`icon`) when using `:obj` to use the icon returned by `getBadgeIcon()`. Requires `symfony/ux-icons` in the host project.