diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9c1364893bc1f8eb3b7d59c28b19e3c595e29527..ec41e39821811d9e27dfde2d1accf2b5a9230ab1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Python Buildpack Changelog
 
+## 100
+
+Preliminary pipenv support.
+
 ## 99
 
 Cleanup.