diff --git a/package.json b/package.json
index 82800bf..8e2d8bb 100644
--- a/package.json
+++ b/package.json
@@ -44,6 +44,7 @@
   "activationEvents": [
     "*"
   ],
+  "extensionKind": "ui",
   "main": "./out/src/material.theme.config",
   "contributes": {
     "commands": [