diff --git a/tox.ini b/tox.ini
index 72ff451..c81016b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -8,7 +8,7 @@ env_list =
 
 base_python =
     py38: python3.8
-    py39: python3.8
+    py39: python3.9
     py310: python3.10
     py311: python3.11
     py312: python3.12