diff --git a/SENET/requirement.txt b/SENET/requirement.txt
index 21554873..76ca34bb 100644
--- a/SENET/requirement.txt
+++ b/SENET/requirement.txt
@@ -28,7 +28,7 @@ html5lib==0.9999999
 httplib2==0.10.3
 idna==2.6
 kwconfig==1.1.7
-lxml==4.1.1
+lxml==4.9.1
 Markdown==2.6.9
 matplotlib==2.1.0
 msgpack-numpy==0.4.1
diff --git a/SENET/src/requirement.txt b/SENET/src/requirement.txt
index 21554873..76ca34bb 100644
--- a/SENET/src/requirement.txt
+++ b/SENET/src/requirement.txt
@@ -28,7 +28,7 @@ html5lib==0.9999999
 httplib2==0.10.3
 idna==2.6
 kwconfig==1.1.7
-lxml==4.1.1
+lxml==4.9.1
 Markdown==2.6.9
 matplotlib==2.1.0
 msgpack-numpy==0.4.1