diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9c1c5e125..128d1c5b0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.8.3] 2019-08-12
+
+### Fixed
+
+- Added write support for RC3000
+
 ## [1.8.2] 2019-08-10
 
 ### Fixed
diff --git a/src/ems_devices.h b/src/ems_devices.h
index f33a1c88a..40c1d8a07 100644
--- a/src/ems_devices.h
+++ b/src/ems_devices.h
@@ -226,7 +226,7 @@ const _Thermostat_Type Thermostat_Types[] = {
     {EMS_MODEL_RC20F, 93, 0x18, "RC20F", EMS_THERMOSTAT_WRITE_YES},
     {EMS_MODEL_RC30, 78, 0x10, "RC30/Nefit Moduline 400", EMS_THERMOSTAT_WRITE_YES},
     {EMS_MODEL_RC35, 86, 0x10, "RC35", EMS_THERMOSTAT_WRITE_YES},
-    {EMS_MODEL_RC300, 158, 0x10, "RC300/RC310/Nefit Moduline 3000", EMS_THERMOSTAT_WRITE_NO},
+    {EMS_MODEL_RC300, 158, 0x10, "RC300/RC310/Nefit Moduline 3000", EMS_THERMOSTAT_WRITE_YES},
     {EMS_MODEL_1010, 165, 0x18, "Nefit Moduline 1010", EMS_THERMOSTAT_WRITE_NO},
 
     // Sieger
diff --git a/src/version.h b/src/version.h
index 5e3b25050..8163ddfed 100644
--- a/src/version.h
+++ b/src/version.h
@@ -6,5 +6,5 @@
 #pragma once
 
 #define APP_NAME "EMS-ESP"
-#define APP_VERSION "1.8.2"
+#define APP_VERSION "1.8.3"
 #define APP_HOSTNAME "ems-esp"