diff --git a/schema.d.ts b/schema.d.ts
index bc1d03e..6964cd8 100644
--- a/schema.d.ts
+++ b/schema.d.ts
@@ -289,6 +289,11 @@ export interface Slot {
    * A markdown description.
    */
   description?: string;
+  
+  /**
+  * A set of CSS selectors for allowable children
+  */
+  allowedChildren?: string[];
 }
 
 /**