1 files changed, 2 insertions, 0 deletions

diff --git a/README.txt b/README.txt
index eb0f13a..8844fb7 100644
--- a/README.txt
+++ b/README.txt
@@ -317,6 +317,8 @@ defuse_stdlib() (*experimental*)
 defusedxml.cElementTree
 -----------------------
 
+**NOTE** ``defusedxml.cElementTree`` is not available in Python 3.9+
+
 parse(), iterparse(), fromstring(), XMLParser