diff --git a/README.rst b/README.rst
index dbe0a98..92e694c 100644
--- a/README.rst
+++ b/README.rst
@@ -27,6 +27,8 @@ Build system, authoring, and QA tools, and a style guide for the
 Usage
 =====
 
+Currently Python >= 3.13 is not supported.
+
 🍀 Tools
 --------