diff --git a/requirements.txt b/requirements.txt
index 2a820199..ab0496c9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 gym>=0.17.2
 numpy>=1.15.4
-ray>=0.8.5
+ray==1.0.0
 pyyaml
 setproctitle
 psutil
@@ -9,7 +9,7 @@ tensorboard==1.14.0
 tensorboardX==1.6
 tensorflow-gpu==1.15.4
 tensorflow-probability==0.7.0
-opencv-python==4.1.0.25
+opencv-python>=4.1.0.25
 gym-super-mario-bros==7.1.6
 pybullet>=2.5.0
 smac