diff --git a/pyproject.toml b/pyproject.toml
index c1b05d0..b2b74d3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,7 +43,7 @@ doc = [
 ]
 lint = [
   "pyright==1.1.411",
-  "ruff==0.15.20",
+  "ruff==0.15.21",
 ]
 test = [
   "lewis",