diff --git a/pyproject.toml b/pyproject.toml
index d22c242e..5070f2c9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,9 +21,9 @@ license = { text = 'BSL-1.1' }
 requires-python = '>=3.8,<3.13'
 readme = 'README.md'
 dependencies = [
-    "numpy>=1.21.0;python_version<'3.10'",
-    "numpy>=1.23.3;python_version>='3.10' and python_version<'3.12'",
-    "numpy>=1.26.0;python_version>='3.12'",
+    "numpy>=1.21.0,<2.0.0;python_version<'3.10'",
+    "numpy>=1.23.3,<2.0.0;python_version>='3.10' and python_version<'3.12'",
+    "numpy>=1.26.0,<2.0.0;python_version>='3.12'",
     "pandas>=1.4.0;python_version<'3.11'",
     "pandas>=1.5.0;python_version>='3.11' and python_version<'3.12'",
     "pandas>=2.1.1;python_version>='3.12'",