diff --git a/Assets/VRM10/Editor/Components/SpringBone/VRM10SpringBoneColliderGroupEditor.cs b/Assets/VRM10/Editor/Components/SpringBone/VRM10SpringBoneColliderGroupEditor.cs
index 079129434..012a3e162 100644
--- a/Assets/VRM10/Editor/Components/SpringBone/VRM10SpringBoneColliderGroupEditor.cs
+++ b/Assets/VRM10/Editor/Components/SpringBone/VRM10SpringBoneColliderGroupEditor.cs
@@ -43,7 +43,11 @@ namespace UniVRM10
                 {
                     bindingPath = nameof(VRM10SpringBoneColliderGroup.Colliders)
                 };
+#if UNITY_2022_3_OR_NEWER
                 m_colliders.selectionChanged += (e) =>
+#else
+                m_colliders.onSelectionChange += (e) =>
+#endif
                 {
                     var item = (SerializedProperty)e.FirstOrDefault();
                     if (item == null)
diff --git a/Assets/VRM10/Editor/Vrm10InstanceEditor.cs b/Assets/VRM10/Editor/Vrm10InstanceEditor.cs
index 4c6cc7c28..906398682 100644
--- a/Assets/VRM10/Editor/Vrm10InstanceEditor.cs
+++ b/Assets/VRM10/Editor/Vrm10InstanceEditor.cs
@@ -309,7 +309,11 @@ namespace UniVRM10
             root.Add(m_springs);
 
             var selected = new PropertyField();
+#if UNITY_2022_3_OR_NEWER
             m_springs.selectedIndicesChanged += (e) =>
+#else
+            m_springs.onSelectedIndicesChange += (e) =>
+#endif
             {
                 var values = e.ToArray();
                 if (values.Length > 0)