diff --git a/requirements.txt b/requirements.txt
index 5f6ae20..c228317 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -52,7 +52,7 @@ launchpadlib==1.10.6
 lazr.restfulclient==0.13.5
 lazr.uri==1.0.3
 lazy==1.3
-lxml==4.2.4
+lxml==4.6.3
 macaroonbakery==1.1.3
 Mako==1.0.7
 MarkupSafe==1.0
diff --git a/textanalyser/requirements.txt b/textanalyser/requirements.txt
index 5d3c22d..b98238f 100644
--- a/textanalyser/requirements.txt
+++ b/textanalyser/requirements.txt
@@ -74,7 +74,7 @@ lazr.restfulclient==0.13.5
 lazr.uri==1.0.3
 lazy==1.3
 louis==3.5.0
-lxml==4.2.4
+lxml==4.6.3
 macaroonbakery==1.1.3
 Mako==1.0.7
 MarkupSafe==1.0