diff --git a/requirements.txt b/requirements.txt
index 016ff28..d81b61e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ git+git://github.com/deepmind/dm_control.git@1038345fa347165b7e29fa677824b2e9ee8
 git+https://github.com/ShangtongZhang/dm_control2gym.git@scalar_fix
 # torchvision==0.2.1
 atari-py==0.1.7
-opencv-python==4.0.0.21
+opencv-python==4.1.1.26
 # tensorboardX==1.4
 scikit-image==0.14.2
 tqdm==4.31.1