diff --git a/setup.py b/setup.py
index 5353549..3fa7f9c 100644
--- a/setup.py
+++ b/setup.py
@@ -6,6 +6,7 @@
     name='torchcast',
     version=__version__,
     license='MIT',
+    python_requires='>= 3.8',
     packages=find_packages(include='torchcast.*'),
     zip_safe=False,
     install_requires=[