diff --git a/src/main/resources/changelog.txt b/src/main/resources/changelog.txt
index e58a64399..826f3c302 100644
--- a/src/main/resources/changelog.txt
+++ b/src/main/resources/changelog.txt
@@ -1,6 +1,11 @@
 Spring Data Cassandra Changelog
 ===============================
 
+Changes in version 1.5.21.RELEASE (2019-05-10)
+----------------------------------------------
+* DATACASS-644 - Release 1.5.21 (Ingalls SR21).
+
+
 Changes in version 2.1.7.RELEASE (2019-05-10)
 ---------------------------------------------
 * DATACASS-652 - Loading Enums using their ordinal fails.