diff --git a/scripts/python/xml2vhdl-ox/requirements.txt b/scripts/python/xml2vhdl-ox/requirements.txt
index 8079ee7..c17e77c 100644
--- a/scripts/python/xml2vhdl-ox/requirements.txt
+++ b/scripts/python/xml2vhdl-ox/requirements.txt
@@ -9,7 +9,7 @@ idna==2.8
 imagesize==1.1.0
 jinja2==2.10
 logging==0.4.9.6
-lxml==4.3.0
+lxml==4.9.1
 markupsafe==1.1.0
 numpy==1.16.0
 packaging==19.0
diff --git a/scripts/python/xml2vhdl-ox/xml2vhdl/requirements.txt b/scripts/python/xml2vhdl-ox/xml2vhdl/requirements.txt
index 1f02723..c631848 100644
--- a/scripts/python/xml2vhdl-ox/xml2vhdl/requirements.txt
+++ b/scripts/python/xml2vhdl-ox/xml2vhdl/requirements.txt
@@ -10,7 +10,7 @@ idna==2.8
 imagesize==1.1.0
 jinja2==2.10.3
 logging==0.4.9.6
-lxml==4.3.0
+lxml==4.9.1
 markupsafe==1.1.1
 numpy==1.16.0
 packaging==19.2