diff --git a/requirements.txt b/requirements.txt
index a8a1c56ce5ff78313a47e34770a80e1ead8c225d..443bccf4e8b1468d897126b52b92174aaf7ec1d4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 ujson
-opencv-python
+opencv-python==4.1.1.26
 pillow
 tqdm
 PyYAML