diff --git a/src/technologies/u.json b/src/technologies/u.json
index 4c01c8ae6..7e9342257 100644
--- a/src/technologies/u.json
+++ b/src/technologies/u.json
@@ -779,6 +779,7 @@
     ],
     "css": "--un-(?:rotate|translate|space-x|text-opacity|border-opacity)",
     "description": "UnoCSS is instant on-demand Atomic CSS engine.",
+    "oss": true,
     "icon": "UnoCSS.svg",
     "website": "https://uno.antfu.me/"
   },