diff --git a/test_requirements.txt b/test_requirements.txt
index f4596c73dcb4..6000d0ec209d 100644
--- a/test_requirements.txt
+++ b/test_requirements.txt
@@ -11,7 +11,7 @@ hypothesis==6.36.2
 idna==3.3
 importlib-metadata==4.8.1; python_version<'3.8'
 iniconfig==1.1.1
-lxml==4.7.1
+lxml==4.9.1
 mypy==0.931
 mypy-extensions==0.4.3
 numpy~=1.21.5; python_version<'3.8'