diff --git a/pyproject.toml b/pyproject.toml
index 93369264..0295cfa6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,7 +11,7 @@ dynamic = ["version", "readme"]
 description = "Parameter estimation tabular data"
 requires-python = ">=3.12"
 dependencies = [
-    "numpy>=1.15.1",
+    "numpy>=2.1",
     "pandas>=1.2.0",
     "python-libsbml>=5.17.0",
     "sympy",