diff --git a/README.md b/README.md
index 2c49716..b86fa20 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-MySensors Library v2.2.0
+MySensors Library v2.2.1-alpha
 
 Please visit www.mysensors.org for more information
 
diff --git a/core/Version.h b/core/Version.h
index 5cffbec..12b135b 100644
--- a/core/Version.h
+++ b/core/Version.h
@@ -48,9 +48,9 @@
 
 #define MYSENSORS_LIBRARY_VERSION_MAJOR							2							//!< Major release version
 #define MYSENSORS_LIBRARY_VERSION_MINOR							2							//!< Minor release version
-#define MYSENSORS_LIBRARY_VERSION_PATCH							0							//!< Patch version
-#define MYSENSORS_LIBRARY_VERSION_PRERELEASE				""				//!< Pre-release suffix, i.e. alpha, beta, rc.1, etc
-#define MYSENSORS_LIBRARY_VERSION_PRERELEASE_NUMBER	0xFF					//!< incremental counter, starting at 0x00. 0xFF for final release
+#define MYSENSORS_LIBRARY_VERSION_PATCH							1							//!< Patch version
+#define MYSENSORS_LIBRARY_VERSION_PRERELEASE				"alpha"				//!< Pre-release suffix, i.e. alpha, beta, rc.1, etc
+#define MYSENSORS_LIBRARY_VERSION_PRERELEASE_NUMBER	0x00					//!< incremental counter, starting at 0x00. 0xFF for final release
 
 
 #if (MYSENSORS_LIBRARY_VERSION_PRERELEASE_NUMBER != 0xFF)
diff --git a/library.json b/library.json
index 9ada90e..0f1bdb9 100644
--- a/library.json
+++ b/library.json
@@ -7,7 +7,7 @@
     "type": "git",
     "url": "https://github.com/mysensors/MySensors.git"
   },
-  "version": "2.2.0",
+  "version": "2.2.1-alpha",
   "frameworks": "arduino",
   "platforms": [
     "atmelavr",
diff --git a/library.properties b/library.properties
index 6a61a5b..6f210d4 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=MySensors
-version=2.2.0
+version=2.2.1-alpha
 author=The MySensors Team
 maintainer=The MySensors Team
 sentence=Home Automation Framework