diff --git a/README.md b/README.md
index eba8d39..49b9b35 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,7 @@ pip install -r requirements.txt
 ```
 
 You should probably use a virtualenv for that.
+I develop `jon` using Python 3.10 but it should work with older versions as well.
 
 ## Running