diff --git a/docs/source/whatsnew/0.9.1.txt b/docs/source/whatsnew/0.9.1.txt
index 1f5791d7..b115b5ee 100644
--- a/docs/source/whatsnew/0.9.1.txt
+++ b/docs/source/whatsnew/0.9.1.txt
@@ -22,6 +22,11 @@ Enhancements
   factor to only compute over stocks for which the filter returns True, rather
   than always computing over the entire universe of stocks. (:issue:`1095`)
 
+* Added :class:`zipline.utils.cache.ExpiringCache`.
+  A cache which wraps entries in a :class:`zipline.utils.cache.CachedObject`,
+  which manages expiration of entries based on the `dt` supplied to the `get`
+  method.
+
 Experimental Features
 ~~~~~~~~~~~~~~~~~~~~~