diff --git a/options.json b/options.json
index f5b445c0..bb165b87 100644
--- a/options.json
+++ b/options.json
@@ -20,6 +20,9 @@
         { "instanceof": "Function" }
       ]
     },
+    "selector": {
+      "type": "string"
+    },
     "transform": {
       "type": "string"
     },