diff --git a/requirements.txt b/requirements.txt
index e75909f..37d0a9f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -62,7 +62,7 @@ Pillow==6.2.1
 scikit-image==0.16.2
 graphviz
 pydot==1.4.1
-opencv-python==4.1.2.30
+opencv-python==4.2.0.32
 pyglet==1.3.2
 
 #pyvirtualdisplay # needed in chapter 16, if on a headless server