diff --git a/README.en.md b/README.en.md
index 84ca489..972dfef 100644
--- a/README.en.md
+++ b/README.en.md
@@ -287,17 +287,6 @@ or [rqt_image_view](https://index.ros.org/p/rqt_image_view/).
 
 <img src=https://rt-net.github.io/images/raspberry-pi-mouse/camera_line_trace.png width=500 />
 
-#### Configure
-
-Edit [`./src/camera_line_follower_component.cpp`](./src/camera_line_follower_component.cpp)
-to change a color of tracking target.
-
-If the object detection accuracy is poor, adjust the camera exposure and parameters in the function
-
-```cpp
-cv::inRange(gray, 0, 100, extracted_bin);
-```
-
 #### Parameters
 
 - `brightness_max_value`
diff --git a/README.md b/README.md
index ec02774..83b8f1a 100644
--- a/README.md
+++ b/README.md
@@ -291,18 +291,6 @@ $ ros2 launch raspimouse_ros2_examples camera_line_follower.launch.py video_devi
 
 <img src=https://rt-net.github.io/images/raspberry-pi-mouse/camera_line_trace.png width=500 />
 
-#### Configure
-
-追跡対象の色を変更するには
-[`./src/camera_line_follower_component.cpp`](./src/camera_line_follower_component.cpp)
-を編集します。
-
-物体検出精度が悪い時にはカメラの露光や関数内のパラメータを調整して下さい。
-
-```cpp
-cv::inRange(gray, 0, 100, extracted_bin);
-```
-
 #### Parameters
 
 - `brightness_max_value`