diff --git a/requirements.txt b/requirements.txt
index da914de..2b05c91 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ itsdangerous==1.1.0
 Jinja2==2.10.1
 joblib==0.13.2
 jsonschema==3.0.1
-lxml==4.3.4
+lxml==4.6.2
 MarkupSafe==1.1.1
 murmurhash==1.0.2
 networkx==2.3