diff --git a/py/requirements.txt b/py/requirements.txt
index ec41dae..0aa6e2b 100644
--- a/py/requirements.txt
+++ b/py/requirements.txt
@@ -2,7 +2,7 @@
 # https://github.com/damnever/pigar
 
 # py/selectivesearchsegmentation_demo.py: 15
-opencv-contrib-python == 4.2.0.32
+opencv-contrib-python == 4.8.1.78
 
 # py/selectivesearchsegmentation_demo.py: 15
 opencv-contrib-python-headless == 4.2.0.32