diff --git a/pyproject.toml b/pyproject.toml
index 02e5e93e..e2a439da 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,7 +34,7 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = [
-  "ruff",
+  "ruff~=0.13.0",
   "mypy[reports]",
   "mypy-gitlab-code-quality",
 #  "pytest-gitlab-code-quality", # pytest version constraint clashes with labthings