diff --git a/requirements.txt b/requirements.txt
index 01fbc42c..fcc04930 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ importlib-metadata==0.23
 jedi==0.15.1
 joblib==0.14.1
 lisflood-utilities>=0.11.11
-lxml==4.4.1
+lxml==4.6.5
 mccabe==0.6.1
 meld==0.2.4
 more-itertools==7.2.0
diff --git a/requirements27.txt b/requirements27.txt
index 0e675248..d8099646 100644
--- a/requirements27.txt
+++ b/requirements27.txt
@@ -24,7 +24,7 @@ importlib-metadata==0.23
 ipython==5.8.0
 ipython-genutils==0.2.0
 lisflood-utilities>=0.11.11
-lxml==4.5.0
+lxml==4.6.5
 mccabe==0.6.1
 mock==3.0.5
 more-itertools==5.0.0