ray 1.9 error while installing gym-pybullet-drones

[Astik-2002]

Hello. after cloning the repository and running pip install -e . command, I'm getting error in installation of ray version 1.9
ERROR: Could not find a version that satisfies the requirement ray==1.9 (from versions: 1.13.0, 2.0.0rc0, 2.0.0rc1, 2.0.0, 2.0.1, 2.1.0, 2.2.0, 2.3.0rc0, 2.3.0, 2.3.1, 2.4.0, 2.5.0, 2.5.1, 2.6.0, 2.6.1, 2.6.2, 2.6.3, 2.7.0rc0, 2.7.0, 2.7.1, 2.7.2, 2.8.0, 2.8.1, 2.9.0, 2.9.1, 2.9.2, 2.9.3, 2.10.0, 2.11.0, 2.12.0, 2.20.0, 2.21.0) ERROR: No matching distribution found for ray==1.9

Can someone share how to solve this?