diff --git a/.github/workflows/py-ci.yml b/.github/workflows/py-ci.yml
index 872c997..22ff75a 100644
--- a/.github/workflows/py-ci.yml
+++ b/.github/workflows/py-ci.yml
@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: [3.6, 3.7, 3.8]
+        python-version: [3.6, 3.7, 3.8, 3.9]
 
     steps:
       - uses: actions/checkout@v2
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3ff6d8f..733f508 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## v2.1.1
 
+- Add cPython 3.9 interpreter unit testing
 - Add CodeQL static source testing 
 - Bump fonttools dependency to v4.16.1
 - Bump aiohttp dependency to v3.6.3