diff --git a/requirements.txt b/requirements.txt
index 27484f44..4e35bb8d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
 numpy
-git+https://github.com/openai/gym
+-e git+https://github.com/openai/gym@v0.9.5#egg=OpenAIGym-v0.9.5
 redis==2.10.6
diff --git a/setup.py b/setup.py
index 30e2faf0..4be20587 100644
--- a/setup.py
+++ b/setup.py
@@ -19,7 +19,7 @@
       packages=find_packages(),
       package_data={'osim': ['models/Geometry/*.vtp', 'models/*.osim']},
       include_package_data=True,
-      install_requires=['numpy','gym', 'redis', 'timeout-decorator'],
+      install_requires=['numpy','gym==0.9.5', 'redis', 'timeout-decorator'],
       classifiers=[
           'Intended Audience :: Science/Research',
           'Operating System :: OS Independent',