diff --git a/jedi/api/environment.py b/jedi/api/environment.py
index 79fac4f9..49e7f4ba 100644
--- a/jedi/api/environment.py
+++ b/jedi/api/environment.py
@@ -17,7 +17,7 @@ import parso
 
 _VersionInfo = namedtuple('VersionInfo', 'major minor micro')
 
-_SUPPORTED_PYTHONS = ['3.8', '3.7', '3.6']
+_SUPPORTED_PYTHONS = ['3.9', '3.8', '3.7', '3.6']
 _SAFE_PATHS = ['/usr/bin', '/usr/local/bin']
 _CONDA_VAR = 'CONDA_PREFIX'
 _CURRENT_VERSION = '%s.%s' % (sys.version_info.major, sys.version_info.minor)