diff --git a/requirements.txt b/requirements.txt
index e70f0b8ad..02ca490c1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,4 +7,4 @@ scipy==1.4.1; platform_python_implementation != "PyPy"
 munkres==1.1.2; platform_python_implementation == "PyPy"
 zopfli==0.1.6
 fs==2.4.11
-lxml==4.4.1
+lxml==4.5.0