diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index df13a9d..838f3bc 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -62,7 +62,7 @@ jobs:
     strategy:
       matrix:
         python:
-        - "3.8"  # oldest Python supported by PSF
+        - "3.9"  # oldest Python supported by PSF
         - "3.11"  # newest Python that is stable
         platform:
         - ubuntu-latest