diff --git a/setup.py b/setup.py
index 7475bc4..4dd07e2 100644
--- a/setup.py
+++ b/setup.py
@@ -51,7 +51,7 @@ def _get_readme():
         ],
         license='MIT',
         install_requires=[
-            'numpy',
+            'numpy<2.0',
             'pymoo~=0.6.1',
             'scipy',
             'deprecated',