diff --git a/HISTORY.md b/HISTORY.md
index e5aad5dcd4..be8a4d66b0 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,5 +1,6 @@
 ### mlpack ?.?.?
 ###### ????-??-??
+  * Added an implementation to Stratify Data (#2671).
 
 ### mlpack 3.4.2
 ###### 2020-10-26