diff --git a/requirements.txt b/requirements.txt
index aee8d8f..1459a15 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ cryptography==2.7
 defusedxml==0.6.0
 gvm-tools==2.0.0b1
 idna==2.8
-lxml==4.4.1
+lxml==4.6.3
 nltk==3.4.5
 paramiko==2.6.0
 pprint==0.1