diff --git a/.github/workflows/pythonapp.yml b/.github/workflows/syntax-and-unit-tests.yml
similarity index 64%
rename from .github/workflows/pythonapp.yml
rename to .github/workflows/syntax-and-unit-tests.yml
index 0baf79c..b8716f6 100644
--- a/.github/workflows/pythonapp.yml
+++ b/.github/workflows/syntax-and-unit-tests.yml
@@ -7,12 +7,19 @@ jobs:
 
     runs-on: ubuntu-18.04
 
+    strategy:
+      matrix:
+        python-version: ['3.6', '3.7', '3.8', '3.x']
+    
+    name: Python ${{ matrix.python-version }} Tests
+
     steps:
     - uses: actions/checkout@v1
-    - name: Set up Python 3.6
+    - name: Setup python
       uses: actions/setup-python@v1
       with:
-        python-version: 3.6
+        python-version: ${{ matrix.python-version }}
+        architecture: x64
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
@@ -21,6 +28,6 @@ jobs:
     - name: Lint with flake8
       run: |
         flake8 --ignore=F401 --exclude=$(grep -v '^#' .gitignore | xargs | sed -e 's/ /,/g')
-    - name: Test with unittest
+    - name: Unit Test with pytest
       run: |
         pytest
diff --git a/.gitignore b/.gitignore
index 7e5e400..2a1042b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -108,4 +108,5 @@ venv.bak/
 .vscode
 profile/data*
 
-examples/data
\ No newline at end of file
+examples/data
+README.rst
diff --git a/CHANGES.md b/CHANGES.md
index 5c968d5..eebee6e 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,8 @@
+# 0.3.3 / 2020-04-23
+
+  * Test multiple python versions
+  * Installation problems: remove pandoc from setup.py
+
 # 0.3.1 / 2021-04-08
 
   * MIT License changed to Apache 2.0
diff --git a/MANIFEST.in b/MANIFEST.in
index 77e3555..783709f 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,2 +1,3 @@
 include README.md
+include README.rst
 recursive-include test *.py
diff --git a/README.md b/README.md
index d0573dc..a5773b5 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,8 @@
 [![PyPI version](https://badge.fury.io/py/numpy-fracdiff.svg)](https://badge.fury.io/py/numpy-fracdiff)
+[![numpy-fracdiff](https://snyk.io/advisor/python/numpy-fracdiff/badge.svg)](https://snyk.io/advisor/python/numpy-fracdiff)
+[![Total alerts](https://img.shields.io/lgtm/alerts/g/ulf1/numpy-fracdiff.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/ulf1/numpy-fracdiff/alerts/)
+[![Language grade: Python](https://img.shields.io/lgtm/grade/python/g/ulf1/numpy-fracdiff.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/ulf1/numpy-fracdiff/context:python)
+[![deepcode](https://www.deepcode.ai/api/gh/badge?key=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJwbGF0Zm9ybTEiOiJnaCIsIm93bmVyMSI6InVsZjEiLCJyZXBvMSI6Im51bXB5LWZyYWNkaWZmIiwiaW5jbHVkZUxpbnQiOmZhbHNlLCJhdXRob3JJZCI6Mjk0NTIsImlhdCI6MTYxOTU0MDI2N30.D99hoaXfMKuj6sva3Z0J3nJ9VXI6V_G1vyGEML9D0c4)](https://www.deepcode.ai/app/gh/ulf1/numpy-fracdiff/_/dashboard?utm_content=gh%2Fulf1%2Fnumpy-fracdiff)
 
 # numpy-fracdiff
 Fractional Difference for Time Series
@@ -35,7 +39,14 @@ pip install -r requirements-demo.txt
 * Jupyter for the examples: `jupyter lab`
 * Check syntax: `flake8 --ignore=F401 --exclude=$(grep -v '^#' .gitignore | xargs | sed -e 's/ /,/g')`
 * Run Unit Tests: `pytest`
-* Upload to PyPi with twine: `python setup.py sdist && twine upload -r pypi dist/*`
+
+Publish
+
+```sh
+pandoc README.md --from markdown --to rst -s -o README.rst
+python setup.py sdist 
+twine upload -r pypi dist/*
+```
 
 ### Clean up 
 
diff --git a/numpy_fracdiff/__init__.py b/numpy_fracdiff/__init__.py
index c7e7f95..6bebf1b 100644
--- a/numpy_fracdiff/__init__.py
+++ b/numpy_fracdiff/__init__.py
@@ -1,3 +1,3 @@
-__version__ = '0.3.2'
+__version__ = '0.3.3'
 
 from .fracdiff_fn import fracdiff
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 6d82478..93dd1c3 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,4 +1,5 @@
 # syntax check, unit test, profiling
+setuptools>=56.0.0
 flake8>=3.8.4
 pytest>=6.2.1
 twine==3.3.0
diff --git a/setup.py b/setup.py
index ad8908e..53e8b7d 100644
--- a/setup.py
+++ b/setup.py
@@ -1,5 +1,11 @@
 from setuptools import setup
-import pypandoc
+import os
+
+
+def read(fname):
+    with open(os.path.join(os.path.dirname(__file__), fname)) as fp:
+        s = fp.read()
+    return s
 
 
 def get_version(path):
@@ -15,14 +21,13 @@ def get_version(path):
 setup(name='numpy-fracdiff',
       version=get_version("numpy_fracdiff/__init__.py"),
       description='Fractional Difference for Time Series',
-      long_description=pypandoc.convert('README.md', 'rst'),
+      long_description=read('README.rst'),
       url='http://github.com/ulf1/numpy-fracdiff',
       author='Ulf Hamster',
       author_email='554c46@gmail.com',
-      license='MIT',
+      license='Apache License 2.0',
       packages=['numpy_fracdiff'],
       install_requires=[
-          'setuptools>=40.0.0',
           'numpy>=1.18.*,<2',
           'numba>=0.48.*'],
       python_requires='>=3.6',