diff --git a/setup.py b/setup.py
index c940277..d134fab 100644
--- a/setup.py
+++ b/setup.py
@@ -5,17 +5,17 @@
     version='0.1.2',
     description='Mixture of Gaussian Processes Model for Sparse Longitudinal Data',
     url='https://github.com/fraenkel-lab/mogp',
-    python_requires='3.7.3',
+    python_requires='==3.7.3',
     packages=['mogp'],
     # package_data={'mogp': ['data/reference_model.pkl']},
 
-#    install_requires=[
-#        'GPy>=1.9.8,<1.10',
-#        'scipy>=1.3.0',
-#        'numpy>=1.16.4,<1.20',
-#        'scikit-learn==0.21.1',
-#        'sklearn>=0.0',
-#        'matplotlib>=3.1.1'],
+   install_requires=[
+       'GPy==1.9.9',
+       'scipy>=1.3.0',
+       'numpy>=1.16.4,<1.20',
+       'scikit-learn==0.21.1',
+       'sklearn>=0.0',
+       'matplotlib>=3.1.1'],
 
     author='Divya Ramamoorthy',
     author_email='divyar@mit.edu',