diff --git a/setup.py b/setup.py
index b0997ab..46a028c 100644
--- a/setup.py
+++ b/setup.py
@@ -59,4 +59,5 @@
     install_requires=install_requires,
     test_suite="tests",
     tests_require=test_requirements,
+    python_requires=">=3.7",
 )