diff --git a/Editor/Components/BlendShapeReplacer.cs b/Editor/Components/BlendShapeReplacer.cs
index bc7546c..1e24436 100644
--- a/Editor/Components/BlendShapeReplacer.cs
+++ b/Editor/Components/BlendShapeReplacer.cs
@@ -601,6 +601,7 @@ Converter.OSCComponents oscComponents
                     ),
                     prefabInstance: avatar
                 );
+            EditorUtility.SetDirty(avatarDescriptor.expressionsMenu);
             avatarDescriptor.expressionParameters = Duplicator.DuplicateAssetToFolder(
                 source: AssetDatabase.LoadAssetAtPath<VRCExpressionParameters>(
                     AssetDatabase.GUIDToAssetPath(BlendShapeReplacer.VRCExpressionParametersGUID)