diff --git a/container-optimizer/requirements.txt b/container-optimizer/requirements.txt
index 61c96cf..21ade05 100644
--- a/container-optimizer/requirements.txt
+++ b/container-optimizer/requirements.txt
@@ -49,7 +49,7 @@ jupyter-nbextensions-configurator==0.4.1
 Keras-Applications==1.0.8
 Keras-Preprocessing==1.1.0
 kiwisolver==1.1.0
-lxml==4.5.0
+lxml==4.6.5
 Markdown==3.2.1
 MarkupSafe==1.1.1
 matplotlib==3.1.3