diff --git a/ui/shared/src/main/scala/works/iterative/ui/model/HtmlUIBuilder.scala b/ui/shared/src/main/scala/works/iterative/ui/model/HtmlUIBuilder.scala
index 7943d9a..c3f5282 100644
--- a/ui/shared/src/main/scala/works/iterative/ui/model/HtmlUIBuilder.scala
+++ b/ui/shared/src/main/scala/works/iterative/ui/model/HtmlUIBuilder.scala
@@ -6,7 +6,12 @@
 trait HtmlUIBuilder[Node, Context]:
   type Ctx = Context
   type Output = Node
-  type Rendered = Ctx ?=> Output
+
+  type Render[+A] = Ctx ?=> A
+
+  type Rendered = Render[Output]
+
+  type RenderBlock = Render[Block]
 
   sealed trait UIElement