diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 05abc7a..b637594 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -11,12 +11,11 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8]
-        os: [ubuntu-latest, macos-10.15]
+        python-version: [3.7, 3.8, 3.9]
+        os: [ubuntu-latest, macos-latest]
     steps:
-    - uses: actions/checkout@v1
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+    - uses: actions/checkout@v3
+    - uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install package
@@ -28,12 +27,11 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8]
-        os: [ubuntu-latest, macos-10.15]
+        python-version: [3.7, 3.8, 3.9]
+        os: [ubuntu-latest, macos-latest]
     steps:
-    - uses: actions/checkout@v1
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+    - uses: actions/checkout@v3
+    - uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install package and dependencies
@@ -45,12 +43,11 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8]
-        os: [ubuntu-latest, macos-10.15]
+        python-version: [3.7, 3.8, 3.9]
+        os: [ubuntu-latest, macos-latest]
     steps:
-    - uses: actions/checkout@v1
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+    - uses: actions/checkout@v3
+    - uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install package and dependencies
diff --git a/setup.py b/setup.py
index a67f21d..fb618f2 100644
--- a/setup.py
+++ b/setup.py
@@ -89,9 +89,9 @@
         'License :: OSI Approved :: MIT License',
         'Natural Language :: English',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
     ],
     description='Pipelines and primitives for machine learning and data science.',
     entry_points = {
@@ -115,7 +115,7 @@
     long_description_content_type='text/markdown',
     name='mlprimitives',
     packages=find_packages(include=['mlprimitives', 'mlprimitives.*']),
-    python_requires='>=3.6,<3.9',
+    python_requires='>=3.7,<3.10',
     setup_requires=setup_requires,
     test_suite='tests',
     tests_require=tests_require,
diff --git a/tox.ini b/tox.ini
index a63bfd3..3817127 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,13 +5,11 @@ envlist = py3{6,7,8}, test-devel
 python =
     3.8: py38, test-devel
     3.7: py37
-    3.6: py36
 
 [gh-actions]
 python =
     3.8: py38, test-devel
     3.7: py37
-    3.6: py36
 
 [testenv]
 passenv = CI TRAVIS TRAVIS_*