diff --git a/CHANGES b/CHANGES
index c4a00e2..356aac4 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,6 +1,6 @@
 Revision history for pyModbusTCP
 
-0.2.x xxxx-xx-xx
+0.2.2.dev0 xxxx-xx-xx
 
     - fix ModbusServer: wrong check of discrete inputs length in DataBank (thanks to OTnetproj).
     - updated compatibility test (python versions): remove 3.7, add 3.12.
diff --git a/pyModbusTCP/constants.py b/pyModbusTCP/constants.py
index acc81ed..cf56b1a 100644
--- a/pyModbusTCP/constants.py
+++ b/pyModbusTCP/constants.py
@@ -1,7 +1,7 @@
 """ pyModbusTCP package constants definition """
 
 # Package version
-VERSION = '0.2.1'
+VERSION = '0.2.2.dev0'
 # Modbus/TCP
 MODBUS_PORT = 502
 # Modbus function code