diff --git a/api.esm.js b/api.esm.js
index eb63966..bd58b99 100644
--- a/api.esm.js
+++ b/api.esm.js
@@ -1,6 +1,5 @@
 import { iaop } from 'xaop';
 import { Vector3, Matrix4, Vector2, Box3, Object3D, LineDashedMaterial, MeshBasicMaterial, LineBasicMaterial, DoubleSide, ShaderMaterial, Color, BufferGeometry, Shape as Shape$1, ShapeGeometry, BufferAttribute, EllipseCurve, ExtrudeGeometry, Mesh, Plane as Plane$1, Line3, Line as Line$1, MathUtils, Path, LineSegments, Geometry, Face3, Float32BufferAttribute, ShapeUtils, CatmullRomCurve3, InstancedInterleavedBuffer, InterleavedBufferAttribute, CylinderBufferGeometry, BoxBufferGeometry } from 'three';
-import { observable, toJS } from 'mobx';
 import { Line2 } from 'three/examples/jsm/lines/Line2';
 import { LineGeometry } from 'three/examples/jsm/lines/LineGeometry';
 import { LineMaterial } from 'three/examples/jsm/lines/LineMaterial';