diff --git a/pyproject.toml b/pyproject.toml
index a59ec013..a0ac7a5d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,5 +3,12 @@ requires = ["setuptools",
             "six",
             "wheel",
             "numpy; python_version=='2.7'",
-            "oldest-supported-numpy; python_version>='3.0'" ]
+# There is no way to compile for versions < 1.25 and up to 2.
+# See https://numpy.org/doc/2.0/dev/depending_on_numpy.html
+#
+# This gives you all versions < 2.0
+#            "oldest-supported-numpy; python_version>='3.0'" ]
+#
+# This gives all versions > 1.25
+            "numpy>=2.0.0rc1; python_version>='3.0'" ]
 build-backend = "setuptools.build_meta"
diff --git a/setup.py b/setup.py
index fe9445a0..c003b8ff 100644
--- a/setup.py
+++ b/setup.py
@@ -142,7 +142,8 @@ def build_extension(self, ext):
 
 minimal = [  # can't compile without this
     "six",
-    "numpy",
+    'numpy ; python_version < "3"',
+    'numpy>=1.23.5 ; python_version >= "3"',
     "setuptools",
     ]