diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index a8a21952..29f2a2e2 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -14,8 +14,10 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.10", "3.12"]
+        python-version: ["3.9", "3.10", "3.12"]
         include:
+          - python-version: "3.9"
+            install-arguments: ". PySide2 usd-core==21.8 PyOpenGL"
           - python-version: "3.10"
             install-arguments: ". PySide2 usd-core==23.2 PyOpenGL"
           - python-version: "3.12"