diff --git a/Chapter01/02-minimal-opencv-python-project/helloopencv/requirements.txt b/Chapter01/02-minimal-opencv-python-project/helloopencv/requirements.txt
index 42e3e5a..f8bc764 100644
--- a/Chapter01/02-minimal-opencv-python-project/helloopencv/requirements.txt
+++ b/Chapter01/02-minimal-opencv-python-project/helloopencv/requirements.txt
@@ -1,3 +1,3 @@
 numpy==1.22.0 
-opencv-contrib-python==4.2.0.32
+opencv-contrib-python==4.8.1.78
 pytest==3.8.0