diff --git a/Cargo.toml b/Cargo.toml
index f41d2dc2..530bed1a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,7 +12,7 @@ members = [
 default-members = ["sudachi", "sudachi-cli"]
 
 [workspace.package]
-version = "0.6.9"
+version = "0.6.10-a1"
 authors = ["Works Applications <sudachi@worksap.co.jp>"]
 edition = "2021"
 rust-version = "1.74.1"
diff --git a/python/docs/source/conf.py b/python/docs/source/conf.py
index addfc676..95efcb52 100644
--- a/python/docs/source/conf.py
+++ b/python/docs/source/conf.py
@@ -22,7 +22,7 @@
 author = 'Works Applications'
 
 # The full version, including alpha/beta/rc tags
-release = '0.6.9'
+release = '0.6.10-a1'
 
 
 # -- General configuration ---------------------------------------------------
diff --git a/python/py_src/sudachipy/__init__.py b/python/py_src/sudachipy/__init__.py
index 9207f57b..1f7d9338 100644
--- a/python/py_src/sudachipy/__init__.py
+++ b/python/py_src/sudachipy/__init__.py
@@ -14,7 +14,7 @@
 from importlib.util import find_spec as _find_spec
 from pathlib import Path as _Path
 
-__version__ = "0.6.9"
+__version__ = "0.6.10-a1"
 
 _DEFAULT_RESOURCEDIR = _Path(__file__).resolve().parent / 'resources'
 _DEFAULT_SETTINGFILE = _DEFAULT_RESOURCEDIR / 'sudachi.json'
diff --git a/python/setup.py b/python/setup.py
index 288acea5..ce3fcded 100644
--- a/python/setup.py
+++ b/python/setup.py
@@ -17,7 +17,7 @@
 
 setup(
     name="SudachiPy",
-    version="0.6.9",
+    version="0.6.10-a1",
     description="Python version of Sudachi, the Japanese Morphological Analyzer",
     long_description=open('README.md', encoding='utf-8').read(),
     long_description_content_type="text/markdown",