diff --git a/mathphys/functions.py b/mathphys/functions.py
index 29f9daa..c5cb1e8 100644
--- a/mathphys/functions.py
+++ b/mathphys/functions.py
@@ -350,7 +350,7 @@ def flatten(x):
 # ------------------------- HELPER METHODS ------------------------------------
 _BUILTINTYPES = (int, float, complex, str, bytes, bool)
 _BUILTINNAMES = {typ.__name__ for typ in _BUILTINTYPES}
-_NPTYPES = (_np.int_, _np.float_, _np.complex_, _np.bool_)
+_NPTYPES = (_np.int_, _np.float64, _np.complex128, _np.bool_)
 
 
 def _save_recursive_hdf5(fil, path, obj, compress):
diff --git a/pyproject.toml b/pyproject.toml
index 5a06ade..89086ae 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools>=44"]
+requires = ["setuptools>=82"]
 build-backend = "setuptools.build_meta"
 
 [project]
@@ -14,7 +14,7 @@ maintainers = [
 description = "LNLS Math and Physics Utilities"
 readme = "README.md" 
 dynamic = ["version", "dependencies"]
-requires-python = ">=3.4"
+requires-python = ">=3.12"
 classifiers = [
     "Intended Audience :: Science/Research",
     "Programming Language :: Python",
diff --git a/requirements.txt b/requirements.txt
index 5fb8af6..dba542d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 importlib-metadata
-numpy>=1.18,<=1.23
+numpy>=1.26.0
 matplotlib>=3.1.2
 h5py>=3.1.0