diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9c13648..ec41e39 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Python Buildpack Changelog
 
+## 100
+
+Preliminary pipenv support.
+
 ## 99
 
 Cleanup.