diff --git a/Readme.md b/Readme.md
index 9294cec..3a06cbd 100644
--- a/Readme.md
+++ b/Readme.md
@@ -46,6 +46,7 @@ Runtime options include:
 
 - python-2.7.8
 - python-3.4.1
-- pypy-1.9 (experimental)
+- pypy-2.3.1 (unsupported, experimental)
+- pypy3-2.3.1 (unsupported, experimental)
 
 Other [unsupported runtimes](https://github.com/heroku/heroku-buildpack-python/tree/master/builds/runtimes) are available as well.