diff --git a/pyproject.toml b/pyproject.toml
index 38875a0..0e2afc7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -253,7 +253,7 @@ dev = [
     # develop on 3.9. (ruff 0.16 needs only >=3.7, so it needs no split.)
     "black~=26.5.1; python_version >= '3.10'",
     "black~=25.11.0; python_version < '3.10'",
-    "ruff~=0.16.0",
+    "ruff>=0.16,<0.18",
     "pre-commit>=3.7.0",
 ]