diff --git a/src/materials/ShaderMaterial.js b/src/materials/ShaderMaterial.js
index b384282..4aea37b 100644
--- a/src/materials/ShaderMaterial.js
+++ b/src/materials/ShaderMaterial.js
@@ -1,6 +1,19 @@
 import { defineComponent, watch } from 'vue';
 import { ShaderMaterial } from 'three';
-import { propsValues, defaultFragmentShader, defaultVertexShader } from '../tools';
+import { propsValues } from '../tools';
+
+const defaultVertexShader = `
+varying vec2 vUv;
+void main(){
+  vUv = uv;
+  gl_Position = projectionMatrix * modelViewMatrix * vec4(position,1.0);
+}`;
+
+const defaultFragmentShader = `
+varying vec2 vUv;
+void main() {
+  gl_FragColor = vec4(vUv.x, vUv.y, 0., 1.0);
+}`;
 
 export default defineComponent({
   inject: ['three', 'mesh'],
diff --git a/src/tools.js b/src/tools.js
index 09aa896..28ad0f7 100644
--- a/src/tools.js
+++ b/src/tools.js
@@ -79,17 +79,3 @@ function getMatcapFormatString(format) {
       return '';
   }
 }
-
-// shader defaults
-export const defaultVertexShader = `
-varying vec2 vUv;
-void main(){
-  vUv = uv;
-  gl_Position = projectionMatrix * modelViewMatrix * vec4(position,1.0);
-}`;
-
-export const defaultFragmentShader = `
-varying vec2 vUv;
-void main() {
-  gl_FragColor = vec4(vUv.x, vUv.y, 0., 1.0);
-}`;