diff --git a/Cargo.toml b/Cargo.toml
index 1213f40..bad757f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "blue_engine_utilities"
-version = "0.1.1"
+version = "0.1.2"
 edition = "2021"
 authors = ["Elham Aryanpur <elhamaryanpur5@gmail.com>"]
 description = "Utilities for Blue Engine"
@@ -15,8 +15,8 @@ animation = ["dep:keyframe_derive", "dep:keyframe"]
 gltf = ["dep:gltf"]
 
 [dependencies]
-# blue_engine = { version = "^0.4.22" }
-blue_engine = { path = "../Blue Engine" } 
+blue_engine = { version = "^0.4.23" }
+#blue_engine = { path = "../Blue Engine" } 
 anyhow = "1.0"
 
 # Animation
diff --git a/examples/basic_light.rs b/examples/basic_light.rs
index 1086ccc..35fc9da 100644
--- a/examples/basic_light.rs
+++ b/examples/basic_light.rs
@@ -18,15 +18,15 @@ fn main() -> anyhow::Result<()> {
         .objects
         .get_mut("light sphere")
         .unwrap()
-        .set_color(1f32, 0f32, 0f32, 1f32);
+        .set_color(1f32, 0f32, 0f32, 1f32).expect("color couldn't change");
 
     // load the monke
-    load_gltf("monke", "./resources/monkey.glb", &mut engine.renderer, &mut engine.objects);
+    load_gltf("monke", "./resources/monkey.glb", &mut engine.renderer, &mut engine.objects).expect("couldn't load the monke model");
     engine
         .objects
         .get_mut("monke")
         .unwrap()
-        .set_color(0.051f32, 0.533f32, 0.898f32, 1f32);
+        .set_color(0.051f32, 0.533f32, 0.898f32, 1f32).expect("color couldn't change");
 
     let mut light_manager = LightManager::new();
     light_manager.set_object_as_light("light sphere".to_string());
@@ -35,7 +35,7 @@ fn main() -> anyhow::Result<()> {
     let start = std::time::SystemTime::now();
 
     engine.update_loop(move |renderer, _, objects, _, camera, _| {
-        light_manager.update(objects, renderer, camera);
+        light_manager.update(objects, renderer, camera).expect("couldn't update the light manager");
 
         let camx = start.elapsed().unwrap().as_secs_f32().sin() * radius;
             let camy = start.elapsed().unwrap().as_secs_f32().sin() * radius;
diff --git a/src/definitions/light.rs b/src/definitions/light.rs
index 6e0376a..59e332e 100644
--- a/src/definitions/light.rs
+++ b/src/definitions/light.rs
@@ -32,6 +32,7 @@ impl crate::LightManager {
         camera: &blue_engine::Camera,
     ) -> anyhow::Result<()> {
         let light_keys: Vec<String> = self.light_objects.keys().map(|x| x.clone()).collect();
+        let shader_content = include_str!("./light_shader.wgsl").to_string();
 
         for i in objects.iter_mut() {
             let i = i.1;
@@ -73,25 +74,22 @@ impl crate::LightManager {
 
                 i.update_uniform_buffer(renderer)?;
 
-                let shader_content = include_str!("./light_shader.wgsl").to_string();
-                i.shader_builder.shader = shader_content;
+                let mut shader_content = shader_content.clone();
 
                 if !self.affected_objects.contains(&i.name) {
-                    let mut changes = Vec::<(&str, &str)>::new();
                     if i.camera_effect {
-                        changes.push(("//@CAMERASTRUCT", r#"
+                        shader_content = shader_content.replace("//@CAMERASTRUCT", r#"
 struct CameraUniforms {
     camera_matrix: mat4x4<f32>,
 };
 @group(1) @binding(0)
-var<uniform> camera_uniform: CameraUniforms;"#));
-                        changes.push(("//@CAMERAOUT", "out.position = camera_uniform.camera_matrix * (transform_uniform.transform_matrix * vec4<f32>(input.position, 1.0));"));
+var<uniform> camera_uniform: CameraUniforms;"#);
+                        shader_content = shader_content.replace("//@CAMERAOUT", "out.position = camera_uniform.camera_matrix * (transform_uniform.transform_matrix * vec4<f32>(input.position, 1.0));");
                     } else {
-                        changes.push(("//@CAMERAOUT","out.position = transform_uniform.transform_matrix * vec4<f32>(input.position, 1.0);"));
+                        shader_content = shader_content.replace("//@CAMERAOUT","out.position = transform_uniform.transform_matrix * vec4<f32>(input.position, 1.0);");
                     }
 
-                    i.shader_builder.parse(changes);
-                    println!("{}", i.shader_builder.shader);
+                    i.shader_builder.shader = shader_content;
                     i.update_shader(renderer)?;
 
                     self.affected_objects.push(i.name.clone());