diff --git a/pyproject.toml b/pyproject.toml
index d8a75cbc3..04e4edaea 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,7 +45,7 @@ tests = [
     "click==8.2.1",
     "inflect==7.5.0",
     "pygithub==2.6.1",
-    "lxml==5.3.0",
+    "lxml==6.0.1",
     "numpy==2.2.6",
     "parse==1.20.2",
     "pytest==8.4.1",