diff --git a/setup.py b/setup.py
index 5ae82a3..6c2092d 100644
--- a/setup.py
+++ b/setup.py
@@ -24,5 +24,6 @@
     packages=find_packages(exclude=["tests*"]),
     include_package_data=True,
     install_requires=["aiohttp"],
-    test_suite="tests"
+    test_suite="tests",
+    python_requires=">=3.6"
 )