diff --git a/src/nostalgia/studio/lib/undostack.cpp b/src/nostalgia/studio/lib/undostack.cpp
index dd5bb88e..a4817245 100644
--- a/src/nostalgia/studio/lib/undostack.cpp
+++ b/src/nostalgia/studio/lib/undostack.cpp
@@ -19,12 +19,14 @@ void UndoStack::redo() noexcept {
 	if (m_stackIdx < m_stack.size()) {
 		m_stack[m_stackIdx++]->redo();
 	}
+	redoTriggered.emit();
 }
 
 void UndoStack::undo() noexcept {
 	if (m_stackIdx) {
 		m_stack[--m_stackIdx]->undo();
 	}
+	undoTriggered.emit();
 }
 
 }
\ No newline at end of file
diff --git a/src/nostalgia/studio/lib/undostack.hpp b/src/nostalgia/studio/lib/undostack.hpp
index c08ae316..71bc6426 100644
--- a/src/nostalgia/studio/lib/undostack.hpp
+++ b/src/nostalgia/studio/lib/undostack.hpp
@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <ox/event/signal.hpp>
 #include <ox/std/error.hpp>
 #include <ox/std/memory.hpp>
 #include <ox/std/vector.hpp>
@@ -30,14 +31,17 @@ class UndoStack {
 		void undo() noexcept;
 
 		[[nodiscard]]
-		constexpr bool canRedo() noexcept {
+		constexpr bool canRedo() const noexcept {
 			return m_stackIdx < m_stack.size();
 		}
 
 		[[nodiscard]]
-		constexpr bool canUndo() noexcept {
+		constexpr bool canUndo() const noexcept {
 			return m_stackIdx;
 		}
+
+		ox::Signal<ox::Error()> redoTriggered;
+		ox::Signal<ox::Error()> undoTriggered;
 };
 
 }
\ No newline at end of file