diff --git a/requirements.txt b/requirements.txt
index 44546852..9bd6959d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ descartes==1.1.0
 idna==2.10
 joblib==1.0.1
 kiwisolver==1.3.1
-lxml==4.6.2
+lxml==4.6.3
 matplotlib==3.3.4
 MetaboDistTrees==0.1.3
 mizani==0.7.2