diff --git a/.github/workflows/osx.yml b/.github/workflows/osx.yml
index 79faa7c6..0dc1ba71 100644
--- a/.github/workflows/osx.yml
+++ b/.github/workflows/osx.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         os: [macOS]
-        python-version: [3.7, 3.8]
+        python-version: [3.6, 3.7, 3.8]
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}
diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index e071eb0a..09bd0e84 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7, 3.8]
+        python-version: [3.6, 3.7, 3.8]
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index abfecf74..165392c3 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         os: [windows]
-        python-version: [3.7, 3.8]
+        python-version: [3.6, 3.7, 3.8]
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}