diff --git a/release_history.py b/release_history.py
index a12c2ef3..7bb2ad1d 100755
--- a/release_history.py
+++ b/release_history.py
@@ -65,6 +65,7 @@
             Tag('2.5.0', '', '20210304'),
             Tag('2.5.1', '', '20210305'),
             Tag('2.5.2', '', '20210528'),
+            Tag('2.5.3', '', '20210823'),
 )