diff --git a/requirements.txt b/requirements.txt
index a165d489..7cbbf7d8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,7 +33,7 @@ dash_cytoscape>=0.1.1
 networkx==2.5
 chart-studio==1.0.0
 xhtml2pdf==0.2.4
-lxml==4.3.4
+lxml==4.6.2
 celery>=4.3.0
 cffi>=1.14.0
 rpy2==3.0.5