diff --git a/CHANGES b/CHANGES
index ef1f88c..857d87c 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,15 @@
+
+Improve error messages when telegrams with bad length byte are read.
+Improve the apator162 driver.
+
+Added the iwmtx5 driver.
+
+Vyacheslav Karpukhin improved the qheat driver to decode propriatary format telegrams. Thanks Vyacheslav!
+
+pvagner improved the lansenth driver to handle negative values. Thanks pvagner!
+
+demetz imporproved ultraheat driver to handle negative values. Thanks demetz!
+
 Version 1.13.1 2023-05-07
 Version 1.13.1-RC1 2023-05-07
 
diff --git a/README.md b/README.md
index ff554de..3e30b5d 100644
--- a/README.md
+++ b/README.md
@@ -552,6 +552,7 @@ Apator Ultrimis (ultrimis)
 Aquametro/Integra Topas Es Kr (topaseskr)
 Axioma W1 (q400)
 Bmeters Hydrodigit (hydrodigit) (partly non-standard protocol)
+Bmeters GSD8-I with IWM-TX5 module (iwmtx5)
 Diehl/Sappel IZAR RC 868 I R4 PL and R3 (izar) (non-standard protocol)
 Diehl HYDRUS (hydrus)
 Diehl IZAR RC I G4 (dme_07)