diff --git a/README.rst b/README.rst
index a167c02..cee538a 100644
--- a/README.rst
+++ b/README.rst
@@ -2,3 +2,15 @@ Quantum photonic multiple scattering
 ====================================
 
 TODO description
+
+Installation
+============
+The package depends on numpy, scipy, cython and customized version of py_gmm.
+The first three can be obtained by pip, the last one can be obtained from github:
+
+git clone --branch standalone_mie  https://github.com/texnokrates/py_gmm.git 
+
+After all dependencies are installed, install qpms to your local python library using
+
+python3 setup.py install --user
+
diff --git a/setup.py b/setup.py
index b37d49a..10b6f78 100644
--- a/setup.py
+++ b/setup.py
@@ -15,7 +15,8 @@ setup(name='qpms',
         version = "0.1",
         packages=['qpms'],
 #        setup_requires=['setuptools_cython'],
-        install_requires=['cython>=0.21'],
+        install_requires=['cython>=0.21', 'py_gmm'],
+        dependency_links=['https://github.com/texnokrates/py_gmm'],
         ext_modules=[qpms_c],
         cmdclass = {'build_ext': build_ext},
         )