diff --git a/pyproject.toml b/pyproject.toml
index 5d158cd..11d91c3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,7 +43,7 @@ ruff = "*"
 
 [tool.ruff]
 line-length = 88
-target-version = "py38"
+target-version = "py39"
 
 [tool.ruff.format]