diff --git a/python/sdist/pyproject.toml b/python/sdist/pyproject.toml
index fd4e7e22b7..f768077172 100644
--- a/python/sdist/pyproject.toml
+++ b/python/sdist/pyproject.toml
@@ -17,7 +17,6 @@ requires-python = ">=3.10"
 dependencies = [
     "cmake-build-extension==0.6.0",
     "sympy>=1.12.1",
-    "numpy>=1.19.3; python_version=='3.9'",
     "numpy>=1.21.4; python_version>='3.10'",
     "numpy>=1.23.2; python_version=='3.11'",
     "numpy>=1.26.2; python_version=='3.12'",