diff --git a/.python-version b/.python-version
index c492825..3ca2bf3 100644
--- a/.python-version
+++ b/.python-version
@@ -1 +1,3 @@
 3.5.6
+3.8.0
+pypy3.5-7.0.0
\ No newline at end of file
diff --git a/.travis.yml b/.travis.yml
index f024e2f..411227c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,39 +1,44 @@
 language: python
 
+# Test against the oldest and newest supported version of Python only
+# NOTE: there appears to only be 1 version of pypy available on Travis
+#       right now, so we just test against that one version
 python:
   - 3.5
-  - 3.7
   - 3.8
   - pypy3.5
 
 install:
   # pinning coverage package until bugs with coveralls plugin is fixed
   # https://github.com/z4r/python-coveralls/issues/73
-  - pip install tox tox-factor wheel python-coveralls "coverage<5.0"
+  - pip install tox wheel python-coveralls "coverage<5.0"
 
 script:
   - echo $TRAVIS_PYTHON_VERSION
-  - export PYVER=`echo $TRAVIS_PYTHON_VERSION | tr "." "\n" | head -n 1 | sed 's/^py//'`
+  - export PYVER=py`echo $TRAVIS_PYTHON_VERSION | sed 's/\.//' | sed 's/^py//'`
   - echo $PYVER
-  - tox -e py$PYVER-lint
-  - tox -e py$PYVER-test
-  - '[ "$TRAVIS_PYTHON_VERSION" = "3.7" ] && coveralls || echo Skipping Coveralls'
+  - tox -e $PYVER-lint
+  - tox -e $PYVER-test
+  # Only publish coverage metrics for the latest supported Python version
+  - '[ "$TRAVIS_PYTHON_VERSION" = "3.8" ] && coveralls || echo Skipping Coveralls'
 
 # Deploy to test.pypi.org for branches
 # Deploy to pypi.org for tags
 # NOTE: You can not replace builds published to pypi, even if you delete one
 #       so you must make sure your versions are always unique
+# NOTE: We also restrict publishing of packages using the latest supported
+#       Python version so we don't publish redundant packages
 jobs:
   include:
     - stage: deploy-release
-      python: 3.7
+      python: 3.8
       script:
         - pip install twine
         - python setup.py bdist_wheel
         - twine upload dist/*.whl -u $DEPLOY_USER -p $DEPLOY_PASS
       if: tag IS true
     - stage: deploy-snapshot
-      python: 3.7
+      python: 3.8
       script:
         - pip install twine
         - python setup.py bdist_wheel
diff --git a/project.prop b/project.prop
index 175a38a..6ef57eb 100644
--- a/project.prop
+++ b/project.prop
@@ -12,7 +12,6 @@
         "pillow"
     ],
     "DEV_DEPENDENCIES" : [
-        "twine",
         "pytest",
         "pytest-cov",
         "mock",
@@ -22,6 +21,7 @@
         "sphinx-rtd-theme",
         "tox",
         "tox-factor",
+        "tox-pyenv",
         # pinning coverage package until bugs with coveralls plugin is fixed
         # https://github.com/z4r/python-coveralls/issues/73
         "coverage<5.0"
diff --git a/requirements.txt b/requirements.txt
index ae6c07a..8c56ff6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,6 @@ appdirs==1.4.4
 astroid==2.4.2
 attrs==19.3.0
 Babel==2.8.0
-bleach==3.1.5
 certifi==2020.6.20
 chardet==3.0.4
 coverage==4.5.4
@@ -26,7 +25,6 @@ packaging==20.4
 pathlib2==2.3.5
 pbr==5.4.5
 Pillow==7.2.0
-pkginfo==1.5.0.1
 pluggy==0.13.1
 py==1.9.0
 Pygments==2.6.1
@@ -36,9 +34,7 @@ pytest==5.4.3
 pytest-cov==2.10.0
 python-dateutil==2.8.1
 pytz==2020.1
-readme-renderer==26.0
 requests==2.24.0
-requests-toolbelt==0.9.1
 six==1.15.0
 snowballstemmer==2.0.0
 Sphinx==3.1.2
@@ -53,12 +49,11 @@ sphinxcontrib-serializinghtml==1.1.4
 toml==0.10.1
 tox==3.17.1
 tox-factor==0.1.2
+tox-pyenv==1.1.0
 tqdm==4.48.0
-twine==1.15.0
 typed-ast==1.4.1
 urllib3==1.25.9
 virtualenv==20.0.27
 wcwidth==0.2.5
-webencodings==0.5.1
 wrapt==1.12.1
 zipp==1.2.0
diff --git a/tox.ini b/tox.ini
index 6af8194..7ae8817 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,22 +1,35 @@
 [tox]
-envlist = {py3,pypy3}-{lint,test,docs}
-skip_missing_interpreters=False
+# explicitly set python versions to make it possible to run tests in parallel
+# using pyenv
+# pypy is an exception case because there is no pypy3.# alias with a patch
+# number, at least on macos
+# we omit the ambiguous "py3" factor so as to not run the tests for a superfluous
+# version that is being run elsewhere
+envlist = py{35,38,py3}-{lint,test,docs}
+skip_missing_interpreters=True
 
 [testenv]
 setenv =
     PROJECT_PATH=friendlypins
 
 usedevelop=True
+
+# Separate working folders for each python version
 envdir =
-    py3: {toxworkdir}/py3
+    py35: {toxworkdir}/py35
+    py38: {toxworkdir}/py38
     pypy3: {toxworkdir}/pypy3
 
+# Use consistent set of dependencies for each major Python version
+# helps minimize overhead of dependency management
 deps =
-    py3: -rrequirements.txt
+    py{35,38}: -rrequirements.txt
     pypy3: -rpypyrequirements.txt
 
+# restrict running of non-test operations to just the latest supported Python
+# version - v3.8 in this case
 commands =
-    py3-lint: python -m pylint setup.py
-    py3-lint: python -m pylint ./src/{env:PROJECT_PATH}
+    py38-lint: python -m pylint setup.py
+    py38-lint: python -m pylint ./src/{env:PROJECT_PATH}
     test: python -m pytest {posargs} ./tests -v --cov-report html --cov {env:PROJECT_PATH} --no-cov-on-fail
-    py3-docs: python -m sphinx -b html -a -n -W --keep-going ./docs ./htmldocs
\ No newline at end of file
+    py38-docs: python -m sphinx -b html -a -n -W --keep-going ./docs ./htmldocs