diff --git a/Assets/VRM/UniHumanoid/PoseModifier/HandPose.cs b/Assets/VRM/UniHumanoid/PoseModifier/HandPose.cs
index c96c4cdf9..5c94664e2 100644
--- a/Assets/VRM/UniHumanoid/PoseModifier/HandPose.cs
+++ b/Assets/VRM/UniHumanoid/PoseModifier/HandPose.cs
@@ -1,6 +1,5 @@
 using System;
 using UnityEngine;
-using UnityEngine.Serialization;
 
 
 namespace UniHumanoid