diff --git a/requirements-testing.txt b/requirements-testing.txt
index 19372eb..cfc73f1 100644
--- a/requirements-testing.txt
+++ b/requirements-testing.txt
@@ -9,7 +9,7 @@ types-PyYAML ~= 6.0
 # that is incompatible with black 25 (last version supporting Python 3.9).
 black == 25.12.*; python_version >= "3.10"
 black == 25.11.*; python_version < "3.10"
-ruff == 0.15.*
+ruff == 0.16.*
 mypy == 2.3.*; python_version >= "3.10"
 mypy == 1.19.*; python_version < "3.10"
 # pydantic: required by the legacy model_v0 (Pydantic) test suite,