diff --git a/requirements-testing.txt b/requirements-testing.txt
index f8ad36e..81adf17 100644
--- a/requirements-testing.txt
+++ b/requirements-testing.txt
@@ -5,6 +5,6 @@ pipgrip == 0.*
 pytest == 8.*
 pytest-cov == 6.*
 pytest-xdist == 3.*
-ruff == 0.8.*
+ruff == 0.9.*
 twine == 6.*
 types-pyyaml == 6.*