diff --git a/doc/release-notes/redex/HISTORY.txt b/doc/release-notes/redex/HISTORY.txt
index 7475624241..c99583a167 100644
--- a/doc/release-notes/redex/HISTORY.txt
+++ b/doc/release-notes/redex/HISTORY.txt
@@ -1,3 +1,7 @@
+v5.2.2
+
+  * added the amb tutorial.
+
 v5.2.1
 
   * rewrote the internals of the pattern matcher to be more consistent