diff --git a/packages/core/src/virtual_dom.rs b/packages/core/src/virtual_dom.rs
index ea4920cde..c727cc4d1 100644
--- a/packages/core/src/virtual_dom.rs
+++ b/packages/core/src/virtual_dom.rs
@@ -254,7 +254,7 @@ impl VirtualDom {
     /// ```
     ///
     /// Note: the VirtualDom is not progressed, you must either "run_with_deadline" or use "rebuild" to progress it.
-    pub fn new(app: fn() -> Element) -> Self {
+    pub fn new<F: Fn() -> Element + Clone + 'static>(app: F) -> Self {
         Self::new_with_props(app, ())
     }
 
@@ -313,7 +313,7 @@ impl VirtualDom {
     }
 
     /// Create a new virtualdom and build it immediately
-    pub fn prebuilt(app: fn() -> Element) -> Self {
+    pub fn prebuilt<F: Fn() -> Element + Clone + 'static>(app: F) -> Self {
         let mut dom = Self::new(app);
         dom.rebuild_in_place();
         dom