diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index eb8c912..30d108a 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -31,7 +31,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.11", "3.10", "3.9", "3.8"]
+        python-version: ["3.13", "3.12", "3.11", "3.10", "3.9"]
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
@@ -68,10 +68,8 @@ jobs:
       if: startsWith(github.ref, 'refs/tags')
       run: python -m build
     - name: Publish distribution to PyPI
-      if: ${{  matrix.python-version == '3.11' && startsWith(github.ref, 'refs/tags') }}
-      uses: pypa/gh-action-pypi-publish@master
-      with:
-        password: ${{ secrets.PYPI_API_TOKEN }}
+      if: ${{  matrix.python-version == '3.12' && startsWith(github.ref, 'refs/tags') }}
+      uses: pypa/gh-action-pypi-publish@release/v1
 
 #
 # Local variables:
diff --git a/pyproject.toml b/pyproject.toml
index e3ef049..83841c5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,7 +22,7 @@ build-backend = "setuptools.build_meta"
 legacy_tox_ini = """
     [tox]
     requires = tox>=4
-    env_list = lint, type, py{38,39,310,311}
+    env_list = lint, type, py{39,310,311,312,313}
     skip_missing_interpreters = True
     
     [testenv]
diff --git a/setup.cfg b/setup.cfg
index 5e05cd8..5608c0c 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -35,7 +35,7 @@ classifiers =
 package_dir =
     = src
 packages = find:
-python_requires = >=3.6
+python_requires = >=3.9
 
 [options.packages.find]
 where = src
diff --git a/src/k2hdkc/k2hdkc.py b/src/k2hdkc/k2hdkc.py
index be002f6..1bee576 100644
--- a/src/k2hdkc/k2hdkc.py
+++ b/src/k2hdkc/k2hdkc.py
@@ -73,7 +73,7 @@ def _set_k2h_handle(self):
             raise RuntimeError("handle should not be K2H_INVALID_HANDLE")
         self._handle = handle
 
-    def __init__(
+    def __init__(       # pylint: disable=too-many-positional-arguments
         self,
         conf_file,
         port=8031,
@@ -139,7 +139,7 @@ def libc(self):
         """returns libc handle"""
         return self._libc
 
-    def set(  # noqa: pylint: disable=too-many-branches
+    def set(  # noqa: pylint: disable=too-many-branches,too-many-positional-arguments
         self,
         key,
         val,
@@ -268,7 +268,7 @@ def get(self, key, password=None):
     #   bool checkattr,
     #   const char* encpass,
     #   const time_t* expire)
-    def add_subkey(
+    def add_subkey(     # pylint: disable=too-many-positional-arguments
         self,
         key,
         subkey,
@@ -530,7 +530,7 @@ def cas_init(
     #   uint8_t newval,
     #   const char* encpass,
     #   const time_t* expire)
-    def cas_set(  # noqa: pylint: disable=too-many-branches
+    def cas_set(  # noqa  pylint: disable=too-many-branches,too-many-positional-arguments
         self, key, old_val, new_val, password=None, expire_duration=None
     ):
         """Sets a value in a cluster by using a CAS operation."""
@@ -742,7 +742,7 @@ def queue_get(self, prefix, is_fifo=True, password=None, expire_duration=None):
     #   bool checkattr,
     #   const char* encpass,
     #   const time_t* expire)
-    def queue_put(
+    def queue_put(      # pylint: disable=too-many-positional-arguments
         self,
         prefix,
         val,
@@ -841,7 +841,7 @@ def keyqueue_get(self, prefix, is_fifo=True, password=None, expire_duration=None
     #   bool checkattr,
     #   const char* encpass,
     #   const time_t* expire)
-    def keyqueue_put(
+    def keyqueue_put(       # pylint: disable=too-many-positional-arguments
         self,
         prefix,
         key,
@@ -952,7 +952,7 @@ def remove_subkeys(
     #   bool checkattr,
     #   const char* encpass,
     #   const time_t* expire)
-    def rename(
+    def rename(     # pylint: disable=too-many-positional-arguments
         self,
         key,
         newkey,