diff --git a/wider/examples/requirement.txt b/wider/examples/requirement.txt
index b4cf7e7..b0c3413 100644
--- a/wider/examples/requirement.txt
+++ b/wider/examples/requirement.txt
@@ -1,2 +1,2 @@
 matplotlib==2.0.0  
-opencv-python==3.2.0.6
+opencv-python==4.2.0.32