diff --git a/pymodbus/__init__.py b/pymodbus/__init__.py
index 241373f2f..d0a8c7532 100644
--- a/pymodbus/__init__.py
+++ b/pymodbus/__init__.py
@@ -18,5 +18,5 @@
 from pymodbus.pdu import ExceptionResponse
 
 
-__version__ = "3.8.0"
+__version__ = "3.9.0dev"
 __version_full__ = f"[pymodbus, version {__version__}]"