diff --git a/pyproject.toml b/pyproject.toml
index d1be0a4..cfcfe50 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,7 +2,8 @@
 requires = ["setuptools",
             "wheel",
             "Cython",
-            "oldest-supported-numpy; python_version >= '3.8'",
+            "numpy==2.0.0,<2.1.0; python_version >= '3.9'",
+            "oldest-supported-numpy; python_version >= '3.8' and python_version < '3.9'",
             "numpy==1.16.1; python_version <= '3.7' and python_version >= '3'",
             "numpy==1.13.3; python_version=='2.7'",
             ]
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index 296d654..e7288c3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,2 @@
-numpy
\ No newline at end of file
+numpy>=1.25; python_version >= '3.9'
+numpy; python_version < '3.9'
\ No newline at end of file