diff --git a/pyproject.toml b/pyproject.toml
index fd2e91a..7153778 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ doc = ["pdoc ~= 14.2"]
 lint = [
     # NOTE: ruff is under active development, so we pin conservatively here
     # and let Dependabot periodically perform this update.
-    "ruff < 0.3.8",
+    "ruff < 0.4.2",
     "mypy >= 1.0",
 ]
 codegen = ["datamodel-code-generator>=0.25.2", "sigstore-rekor-types[lint]"]