diff --git a/engine/animation/Timeline.h b/engine/animation/Timeline.h
index 1c207a7..782339e 100644
--- a/engine/animation/Timeline.h
+++ b/engine/animation/Timeline.h
@@ -4,7 +4,7 @@
 
 #ifndef SHOOTER_TIMELINE_H
 #define SHOOTER_TIMELINE_H
-
+#include <memory>
 #include "Animation.h"
 
 class AnimationListTag final {