diff --git a/setup.py b/setup.py
index cf7ba1b0..6018cebd 100644
--- a/setup.py
+++ b/setup.py
@@ -148,7 +148,7 @@ def initialize_options(self):
     author_email='info@precice.org',
     license='LGPL-3.0',
     python_requires='>=3',
-    install_requires=['numpy', 'mpi4py', 'Cython'],
+    install_requires=['numpy<2', 'mpi4py', 'Cython'],
     # mpi4py is only needed, if preCICE was compiled with MPI
     # see https://github.com/precice/python-bindings/issues/8
     packages=['precice'],