diff --git a/requirements.txt b/requirements.txt
index da35a9c..976a217 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -51,7 +51,7 @@ jupyter-core==4.6.1
 kiwisolver==1.1.0
 llvmlite==0.31.0
 locket==0.2.0
-lxml==4.5.0
+lxml==4.6.5
 MarkupSafe==1.1.1
 matplotlib==3.1.2
 mistune==0.8.4