diff --git a/docker/ot-import/requirements.txt b/docker/ot-import/requirements.txt
index 087e867..7b11487 100644
--- a/docker/ot-import/requirements.txt
+++ b/docker/ot-import/requirements.txt
@@ -19,7 +19,7 @@ idna==2.8
 isodate==0.6.0
 jsonpickle==1.1
 jsonschema==3.0.0a3
-lxml==4.3.2
+lxml==4.9.1
 more-itertools==5.0.0
 networkx==2.2
 numpy==1.16.2