diff --git a/HISTORY.rst b/HISTORY.rst
index 8ec95eb4..aa87ed80 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -15,6 +15,9 @@ PlatformIO Core 6
 
 **A professional collaborative platform for declarative, safety-critical, and test-driven embedded development.**
 
+6.1.10 (2023-??-??)
+~~~~~~~~~~~~~~~~~~~
+
 6.1.9 (2023-07-06)
 ~~~~~~~~~~~~~~~~~~
 
diff --git a/platformio/__init__.py b/platformio/__init__.py
index c720d005..f5675fd6 100644
--- a/platformio/__init__.py
+++ b/platformio/__init__.py
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-VERSION = (6, 1, 9)
+VERSION = (6, 1, "10a1")
 __version__ = ".".join([str(s) for s in VERSION])
 
 __title__ = "platformio"