diff --git a/requirements.txt b/requirements.txt
index 53d4e79..deec630 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ itsdangerous==0.24
 Jinja2==2.10
 JPype1==0.6.2
 jusText==2.2.0
-lxml==4.1.1
+lxml==4.6.3
 MarkupSafe==1.0
 mongoengine==0.15.0
 nltk==3.2.5