diff --git a/.github/workflows/CI-workflow.yml b/.github/workflows/CI-workflow.yml
index 570d9d3..3f1666b 100644
--- a/.github/workflows/CI-workflow.yml
+++ b/.github/workflows/CI-workflow.yml
@@ -11,7 +11,7 @@ jobs:
     strategy:
       matrix:
         python-version: ['3.7', '3.8', '3.9']
-        os: [macos-latest, ubuntu-latest]
+        os: [macos-latest, ubuntu-latest, windows-latest]
 
     steps:
       - uses: actions/checkout@v2
diff --git a/.github/workflows/deploy_pipy.yml b/.github/workflows/deploy_pipy.yml
new file mode 100644
index 0000000..7e79958
--- /dev/null
+++ b/.github/workflows/deploy_pipy.yml
@@ -0,0 +1,34 @@
+name: Release to PyPI
+
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  deploy:
+
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        python-version: ['3.7', '3.8', '3.9']
+        os: [macos-latest, ubuntu-latest, windows-latest]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install setuptools wheel twine
+        pip install -e .
+    - name: Build and publish
+      env:
+        TWINE_USERNAME: PinkShnack
+        TWINE_PASSWORD: ${{ secrets.PYPI_UPLOAD_TOKEN }}
+      run: |
+        python setup.py sdist bdist_wheel
+        twine upload --skip-existing dist/*
diff --git a/CHANGELOG b/CHANGELOG
index 336bd9a..d810d31 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,4 +1,5 @@
 0.1.4
+ - ci: add auto pypi push actions
  - ref, doc: fix api doc link references
  - add initial (useable) tests in test directory
  - add CHANGELOG
diff --git a/temul/_version.py b/temul/_version.py
new file mode 100644
index 0000000..0830c0f
--- /dev/null
+++ b/temul/_version.py
@@ -0,0 +1,195 @@
+"""Determine package version from git repository tag
+
+Each time this file is imported it checks whether the package version
+can be determined using `git describe`. If this fails (because either
+this file is not located at the 1st level down the repository root or
+it is not under version control), the version is read from the script
+"_version_save.py" which is not versioned by git, but always included
+in the final distribution archive (e.g. via PyPI). If the git version
+does not match the saved version, then "_version_save.py" is updated.
+
+
+Usage
+-----
+1. Put this file in your main module directory:
+
+    REPO_ROOT/package_name/_version.py
+
+2. Add this line to REPO_ROOT/package_name/__init__.py
+
+    from ._version import version as __version__  # noqa: F401
+
+3. (Optional) Add this line to REPO_ROOT/.gitignore
+
+    _version_save.py
+
+Features
+--------
+- supports Python 2 and 3
+- supports frozen applications (e.g. PyInstaller)
+- supports installing into a virtual environment that is located in
+  a git repository
+- saved version is located in a python file and therefore no other
+  files (e.g. MANIFEST.in) need be edited
+- fallback version is the creation date
+- excluded from code coverage via "pragma: no cover"
+
+Changelog
+---------
+2019-11-06.2
+ - use os.path.split instead of counting os.path.sep (Windows)
+2019-11-06
+ - remove deprecated imp dependency (replace with parser)
+ - check whether this file is versioned and its location is correct
+ - code cleanup and docs update
+"""
+
+# Put the entire script into a `True` statement and add the hint
+# `pragma: no cover` to ignore code coverage here.
+if True:  # pragma: no cover
+    import os
+    from os.path import abspath, basename, dirname, join, split
+    import subprocess
+    import sys
+    import time
+    import traceback
+    import warnings
+
+    def git_describe():
+        """
+        Return a string describing the version returned by the
+        command `git describe --tags HEAD`.
+        If it is not possible to determine the correct version,
+        then an empty string is returned.
+        """
+        # Make sure we are in a directory that belongs to the correct
+        # repository.
+        ourdir = dirname(abspath(__file__))
+
+        def _minimal_ext_cmd(cmd):
+            # Construct minimal environment
+            env = {}
+            for k in ['SYSTEMROOT', 'PATH']:
+                v = os.environ.get(k)
+                if v is not None:
+                    env[k] = v
+            # LANGUAGE is used on win32
+            env['LANGUAGE'] = 'C'
+            env['LANG'] = 'C'
+            env['LC_ALL'] = 'C'
+            pop = subprocess.Popen(cmd,
+                                   stdout=subprocess.PIPE,
+                                   stderr=subprocess.PIPE,
+                                   env=env)
+            out = pop.communicate()[0]
+            return out.strip().decode('ascii', errors="ignore")
+
+        # change directory
+        olddir = abspath(os.curdir)
+        os.chdir(ourdir)
+
+        # Make sure that we are getting "git describe" from our own
+        # repository (and not from a repository where we just happen
+        # to be in the directory tree).
+        git_revision = ""
+        try:
+            # If this file is not under version control, "loc" will
+            # be empty.
+            loc = _minimal_ext_cmd(['git', 'ls-files', '--full-name',
+                                    __file__])
+            # If it is under version control, it should be located
+            # one hierarchy down from the repository root (either
+            # __file__ is "docs/conf.py" or "package_name/_version.py".
+            if len(split(loc)) == 2:
+                try:
+                    git_revision = _minimal_ext_cmd(['git', 'describe',
+                                                     '--tags', 'HEAD'])
+                except OSError:
+                    pass
+        except OSError:
+            pass
+        # Go back to original directory
+        os.chdir(olddir)
+
+        return git_revision
+
+    def load_version(versionfile):
+        """load version from version_save.py"""
+        longversion = ""
+        try:
+            with open(versionfile, "r") as fd:
+                data = fd.readlines()
+                for line in data:
+                    if line.startswith("longversion"):
+                        longversion = line.split("=")[1].strip().strip("'")
+        except BaseException:
+            try:
+                from ._version_save import longversion
+            except BaseException:
+                try:
+                    from _version_save import longversion
+                except BaseException:
+                    pass
+
+        return longversion
+
+    def write_version(version, versionfile):
+        """save version to version_save.py"""
+        data = "#!/usr/bin/env python\n" \
+            + "# This file was created automatically\n" \
+            + "longversion = '{VERSION}'\n"
+        try:
+            with open(versionfile, "w") as fd:
+                fd.write(data.format(VERSION=version))
+        except BaseException:
+            if not os.path.exists(versionfile):
+                # Only issue a warning if the file does not exist.
+                msg = "Could not write package version to {}.".format(
+                    versionfile)
+                warnings.warn(msg)
+
+    hdir = dirname(abspath(__file__))
+    if basename(__file__) == "conf.py" and "name" in locals():
+        # This script is executed in conf.py from the docs directory
+        versionfile = join(join(join(hdir, ".."),
+                                name),  # noqa: F821
+                           "_version_save.py")
+    else:
+        # This script is imported as a module
+        versionfile = join(hdir, "_version_save.py")
+
+    # Determine the accurate version
+    longversion = ""
+
+    # 1. git describe
+    try:
+        # Get the version using `git describe`
+        longversion = git_describe()
+    except BaseException:
+        pass
+
+    # 2. previously created version file
+    if longversion == "":
+        # Either this is not a git repository or we are in the
+        # wrong git repository.
+        # Get the version from the previously generated `_version_save.py`
+        longversion = load_version(versionfile)
+
+    # 3. last resort: date
+    if longversion == "":
+        print("Could not determine version. Reason:")
+        print(traceback.format_exc())
+        ctime = os.stat(__file__)[8]
+        longversion = time.strftime("%Y.%m.%d-%H-%M-%S", time.gmtime(ctime))
+        print("Using creation time as version: {}".format(longversion))
+
+    if not hasattr(sys, 'frozen'):
+        # Save the version to `_version_save.py` to allow distribution using
+        # `python setup.py sdist`.
+        # This is only done if the program is not frozen (with e.g.
+        # pyinstaller),
+        if longversion != load_version(versionfile):
+            write_version(longversion, versionfile)
+
+    # PEP 440-conform development version:
+    version = ".post".join(longversion.split("-")[:2])