Add keyframe from CustomEditor

Hello, I have a custom editor for a component. There is a button, when clicked some property of the component will be modified. I've used EditorUtility.SetDirty ( target ); serializedObject.ApplyModifiedProperties(); and it works as expected. But my problem is, when clicking the button in animation recording mode, the value changes but the animation window won't add any keyframe. ( but when modifying the value directly from inspector, the animation window add keyframes ) How to add keyframe directly from OnInspectorGUI? or is there a way to notify unity that the property has been modified and it should add keyframe. I've done many research but can't find a solution.