diff --git a/HISTORY.md b/HISTORY.md
index c8a3c94497..001e6e2762 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -16,6 +16,8 @@
   * HMM: add functions to calculate likelihood for data stream with/without
     pre-calculated emission probability (#2142).
 
+  * Replace Boost serialization library by Cereal (#2458).
+
 ### mlpack 3.4.2
 ###### 2020-10-26
   * Added Mean Absolute Percentage Error.