diff --git a/requirements-dev.txt b/requirements-dev.txt
index f9d54b2..4abe3fa 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -94,7 +94,7 @@ requests==2.32.5
     #   pyUSPTO (pyproject.toml)
     #   sphinx
     #   sphinx-immaterial
-ruff==0.14.8
+ruff==0.14.9
     # via pyUSPTO (pyproject.toml)
 snowballstemmer==3.0.1
     # via sphinx