diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index b27883a..e278318 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.6', '3.7', '3.8', '3.9']
+        python-version: ['3.7', '3.8', '3.9']
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python
diff --git a/images/python_version_badge.svg b/images/python_version_badge.svg
index 703ab8f..5e2d0e6 100644
--- a/images/python_version_badge.svg
+++ b/images/python_version_badge.svg
@@ -1 +1 @@
-<svg height="20" width="160.2" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><linearGradient id="smooth" x2="0" y2="100%"><stop offset="0" stop-color="#bbb" stop-opacity=".1"/><stop offset="1" stop-opacity=".1"/></linearGradient><clipPath id="round"><rect fill="#fff" height="20" rx="3" width="160.2"/></clipPath><g clip-path="url(#round)"><rect fill="#555" height="20" width="48.1"/><rect fill="#007ec6" height="20" width="112.1" x="48.1"/><rect fill="url(#smooth)" height="20" width="160.2"/></g><g fill="#fff" font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="110" text-anchor="middle"><text fill="#010101" fill-opacity=".3" lengthAdjust="spacing" textLength="381.0" transform="scale(0.1)" x="250.5" y="150">Python</text><text lengthAdjust="spacing" textLength="381.0" transform="scale(0.1)" x="250.5" y="140">Python</text><text fill="#010101" fill-opacity=".3" lengthAdjust="spacing" textLength="1021.0" transform="scale(0.1)" x="1031.5" y="150">3.6 | 3.7 | 3.8 | 3.9</text><text lengthAdjust="spacing" textLength="1021.0" transform="scale(0.1)" x="1031.5" y="140">3.6 | 3.7 | 3.8 | 3.9</text></g></svg>
\ No newline at end of file
+<svg height="20" width="160.2" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><linearGradient id="smooth" x2="0" y2="100%"><stop offset="0" stop-color="#bbb" stop-opacity=".1"/><stop offset="1" stop-opacity=".1"/></linearGradient><clipPath id="round"><rect fill="#fff" height="20" rx="3" width="160.2"/></clipPath><g clip-path="url(#round)"><rect fill="#555" height="20" width="48.1"/><rect fill="#007ec6" height="20" width="112.1" x="48.1"/><rect fill="url(#smooth)" height="20" width="160.2"/></g><g fill="#fff" font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="110" text-anchor="middle"><text fill="#010101" fill-opacity=".3" lengthAdjust="spacing" textLength="381.0" transform="scale(0.1)" x="250.5" y="150">Python</text><text lengthAdjust="spacing" textLength="381.0" transform="scale(0.1)" x="250.5" y="140">Python</text><text fill="#010101" fill-opacity=".3" lengthAdjust="spacing" textLength="1021.0" transform="scale(0.1)" x="1031.5" y="150">3.7 | 3.8 | 3.9</text><text lengthAdjust="spacing" textLength="1021.0" transform="scale(0.1)" x="1031.5" y="140">3.6 | 3.7 | 3.8 | 3.9</text></g></svg>