diff --git a/setup.cfg b/setup.cfg
index f977cab89..e1a7858cf 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [egg_info]
 # TODO replace
-tag_build = dev5
+tag_build = a3
 
 [aliases]
 test=pytest
diff --git a/setup.py b/setup.py
index a683968e3..3c8e9799f 100644
--- a/setup.py
+++ b/setup.py
@@ -163,6 +163,7 @@ def load_description():
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
         'Programming Language :: Cython',
     ],
     keywords='wsgi web api framework rest http cloud',