diff --git a/doc/release-notes/drscheme/HISTORY.txt b/doc/release-notes/drscheme/HISTORY.txt
index 2ecc672274..6421c44f94 100644
--- a/doc/release-notes/drscheme/HISTORY.txt
+++ b/doc/release-notes/drscheme/HISTORY.txt
@@ -1,3 +1,16 @@
+------------------------------
+        Version 4.3
+------------------------------
+
+  . minor bug fixes
+
+------------------------------
+        Version 4.2
+------------------------------
+
+  . contract library's function contract 
+    combinatiors now preserve tail recursion.
+
 ------------------------------
         Version 4.1
 ------------------------------