diff --git a/setup.py b/setup.py
index 8618421c1..ef6eb4d6d 100644
--- a/setup.py
+++ b/setup.py
@@ -15,6 +15,9 @@
       license="LGPL",
       platforms='any',
       python_requires='>=3.6',
-      install_requires=['gym >= 0.11'],
+      install_requires=[
+            'gym >= 0.13.1',
+            'numpy',
+      ],
       packages=find_packages(),
       )