diff --git a/python/setup.py b/python/setup.py
index 39bb99b..7580b7d 100644
--- a/python/setup.py
+++ b/python/setup.py
@@ -50,5 +50,9 @@ setup(
   packages=["openEMS", ],
   package_data={'openEMS': ['*.pxd']},
   python_requires='>=3.9',
+  install_requires=[
+    'h5py>=3.10.0',   # BSD 3-Clause (https://github.com/h5py/h5py/blob/master/LICENSE)
+    'numpy>=1.26.2',  # BSD 3-Clause (https://github.com/numpy/numpy/blob/main/LICENSE.txt)
+  ],
   ext_modules = cythonize(extensions, language_level = "3")
  )