diff --git a/README.md b/README.md
index 301da5d..c3d55e4 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,7 @@
-MySensors Library v2.2.0-beta
+Arduino
+=======
+
+MySensors Arduino Library v2.1.0-beta
 
 Please visit www.mysensors.org for more information
 
@@ -14,4 +17,4 @@ Current build status of development branch: [![Build Status](https://ci.mysensor
 
 Current build status of master branch (nightly build of Arduino IDE): [![Build Status](https://ci.mysensors.org/job/Nightlies/job/MySensorsArduinoNightlyIDE/job/master/badge/icon)](https://ci.mysensors.org/job/Nightlies/job/MySensorsArduinoNightlyIDE/job/master/)
 
-Current build status of development branch (nightly build of Arduino IDE): [![Build Status](https://ci.mysensors.org/job/Nightlies/job/MySensorsArduinoNightlyIDE/job/development/badge/icon)](https://ci.mysensors.org/job/Nightlies/job/MySensorsArduinoNightlyIDE/job/development/)
\ No newline at end of file
+Current build status of development branch (nightly build of Arduino IDE): [![Build Status](https://ci.mysensors.org/job/Nightlies/job/MySensorsArduinoNightlyIDE/job/development/badge/icon)](https://ci.mysensors.org/job/Nightlies/job/MySensorsArduinoNightlyIDE/job/development/)
diff --git a/core/Version.h b/core/Version.h
index 28fb4d3..0f781ab 100644
--- a/core/Version.h
+++ b/core/Version.h
@@ -24,6 +24,6 @@
 #ifndef Version_h
 #define Version_h
 
-#define MYSENSORS_LIBRARY_VERSION "2.2.0-beta"
+#define MYSENSORS_LIBRARY_VERSION "2.1.0-beta"
 
 #endif
diff --git a/library.json b/library.json
index ad7226d..ac8c2f3 100644
--- a/library.json
+++ b/library.json
@@ -7,7 +7,7 @@
     "type": "git",
     "url": "https://github.com/mysensors/MySensors.git"
   },
-  "version": "2.2.0-beta",
+  "version": "2.1.0-beta",
   "frameworks": "arduino",
   "platforms": [
     "atmelavr",
diff --git a/library.properties b/library.properties
index b3ccbfa..f0d927c 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=MySensors
-version=2.2.0-beta
+version=2.1.0-beta
 author=The MySensors Team
 maintainer=The MySensors Team
 sentence=Home Automation Framework