diff --git a/requirements.txt b/requirements.txt
index 36ea2c1c..5e553aa2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ requests-mock==1.8.0
 Sphinx==1.5.6
 sphinx_rtd_theme==0.5.0
 sphinxcontrib-versioning==2.2.1
-lxml==4.5.1
+lxml==4.5.2
 defusedxml==0.5.0
 requests==2.24.0
 -e .