diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 6b3ea6d..1e419c4 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,10 +10,10 @@ jobs:
       matrix:
         include:
         - os: ubuntu-latest
-          python-version: 3.9  # Need to match that used by ChimeraX
+          python-version: 3.11  # Need to match that used by ChimeraX
           with_qt:
         - os: macos-latest
-          python-version: 3.9  # Need to match that used by ChimeraX
+          python-version: 3.11  # Need to match that used by ChimeraX
           with_qt: true
     runs-on: ${{ matrix.os }}