diff --git a/fastremap.pyx b/fastremap.pyx
index 7fad14c..dcd6ad8 100644
--- a/fastremap.pyx
+++ b/fastremap.pyx
@@ -29,6 +29,7 @@ import operator
 
 import numpy as np
 cimport numpy as cnp
+cnp.import_array()
 
 from libcpp.vector cimport vector
 
diff --git a/setup.py b/setup.py
index cf916c9..b245bdb 100644
--- a/setup.py
+++ b/setup.py
@@ -23,7 +23,7 @@ def __repr__(self):
 
 setuptools.setup(
   setup_requires=['pbr', 'cython', 'numpy'],
-  python_requires=">=3.7,<4.0",
+  python_requires=">=3.8,<4.0",
   pbr=True,
   ext_modules=[
     setuptools.Extension(