diff --git a/setup.py b/setup.py
index 81236c78fcfd11e657446f5e4c272ea39812203e..9c7b389340f3b4dda58536b0db02f91ba9b2ffe6 100644
--- a/setup.py
+++ b/setup.py
@@ -25,9 +25,5 @@ setup(
             'gsuitesync=gsuitesync:main',
         ]
     },
-    extras_require={
-        ':python_version < "3.7"': [
-            'dataclasses',
-        ],
-    }
+    python_requires='>=3.9',
 )