diff --git a/sdks/python/pyproject.toml b/sdks/python/pyproject.toml
index 9a00fe03ea07..b3fe73f4697d 100644
--- a/sdks/python/pyproject.toml
+++ b/sdks/python/pyproject.toml
@@ -31,7 +31,8 @@ requires = [
     # Avoid https://github.com/pypa/virtualenv/issues/2006
     "distlib==0.4.4",
     # Numpy headers
-    "numpy>=1.23.2,<2.6.0", # Update setup.py as well.
+    "numpy>=1.23.2,<2.6.0; python_version >= '3.12'", # Update setup.py as well.
+    "numpy>=1.23.2,<2.5.0; python_version < '3.12'",
     # having cython here will create wheels that are platform dependent.
     "cython>=3.2.6,<4",
     ## deps for generating external transform wrappers:
diff --git a/sdks/python/setup.py b/sdks/python/setup.py
index 8236944aea19..98d5b631f13b 100644
--- a/sdks/python/setup.py
+++ b/sdks/python/setup.py
@@ -446,7 +446,8 @@ def get_portability_package_data():
           # Use a strict upper bound.
           # Increment the lower bound when the minimum Python version is
           # updated.
-          'numpy>=1.23.2,<2.6.0',  # Update pyproject.toml as well.
+          'numpy>=1.23.2,<2.6.0; python_version >= "3.12"',  # Update pyproject.toml as well.
+          'numpy>=1.23.2,<2.5.0; python_version < "3.12"',
           'objsize>=0.6.1,<0.8.0',
           'packaging>=22.0',
           'pillow>=12.1.1,<14',