diff --git a/setup.py b/setup.py
index 2e15eda46..629fe7586 100644
--- a/setup.py
+++ b/setup.py
@@ -34,6 +34,7 @@ setup(
         "Operating System :: POSIX",
         "Operating System :: Microsoft :: Windows",
         "Programming Language :: Python :: 3 :: Only",
+        "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",