diff --git a/.github/unittest/linux_olddeps/scripts_gym_0_13/environment.yml b/.github/unittest/linux_olddeps/scripts_gym_0_13/environment.yml
index d34011e7bdc..ba8567450c9 100644
--- a/.github/unittest/linux_olddeps/scripts_gym_0_13/environment.yml
+++ b/.github/unittest/linux_olddeps/scripts_gym_0_13/environment.yml
@@ -22,6 +22,7 @@ dependencies:
     - scipy
     - hydra-core
     - dm_control -e git+https://github.com/deepmind/dm_control.git@c053360edea6170acfd9c8f65446703307d9d352#egg={dm_control}
+    - mujoco<3.2.1
     - patchelf
     - pyopengl==3.1.4
     - ray