diff --git a/matrix.yaml b/matrix.yaml
index faa1461..eb0d503 100644
--- a/matrix.yaml
+++ b/matrix.yaml
@@ -5,6 +5,7 @@ CUDA_VER:
   - "12.2.2"
   - "12.5.1"
 PYTHON_VER:
+  - "3.9"
   - "3.10"
   - "3.11"
   - "3.12"