diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index d3b53bb..cf176eb 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.21.5
+current_version = 0.21.6
 commit = True
 tag = False
 
diff --git a/pyproject.toml b/pyproject.toml
index 46f26e6..1e87fbc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,7 +34,7 @@ dependencies = [
     "traitlets>=5.9.0",
 ]
 name = "pyxcp"
-version = "0.21.5"
+version = "0.21.6"
 readme = "README.md"
 description = "Universal Calibration Protocol for Python"
 keywords = ["automotive", "ecu", "xcp", "asam", "autosar"]
diff --git a/pyxcp/__init__.py b/pyxcp/__init__.py
index 01f8886..d72f86c 100644
--- a/pyxcp/__init__.py
+++ b/pyxcp/__init__.py
@@ -25,4 +25,4 @@
 from .transport import Usb
 
 # if you update this manually, do not forget to update .bumpversion.cfg
-__version__ = "0.21.5"
+__version__ = "0.21.6"