diff --git a/README.md b/README.md
index 2bb378d..73a9159 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,11 @@ This project is a code for Ebook snipping and PDF converting
 ## Installation
 1. Clone this repository to your local machine.
 
+## Warn
+- Keep `optimize = 0` in the `.spec` file to avoid conflicts with OpenCV when using PyInstaller.
+- Setting `optimize = 2` may cause runtime errors related to `numpy` and `opencv-python` due to compatibility issues with compiled C extensions.
+- This ensures better stability, especially when working with image processing libraries like OpenCV and NumPy.
+
 ## Contributing
 Feel free to contribute to this project by opening issues or pull requests. Any feedback or suggestions are welcome!