diff --git a/HISTORY b/HISTORY
index cc05a0f..98227dc 100644
--- a/HISTORY
+++ b/HISTORY
@@ -1,3 +1,12 @@
+=====================
+ What's new in 1.3.9
+=====================
+
+Revert adding _binary prefix for bytes/bytearray parameter. It broke backward compatibility.
+
+Fix Windows compile error on MSVC.
+
+
 =====================
  What's new in 1.3.8
 =====================