diff --git a/TOOLS/requirements.txt b/TOOLS/requirements.txt
index 0012df70e..79fc1682f 100644
--- a/TOOLS/requirements.txt
+++ b/TOOLS/requirements.txt
@@ -21,7 +21,7 @@ feedparser==5.1.3
 gdata==2.0.18
 gevent==1.0.1
 greenlet==0.4.2
-lxml==3.3.5
+lxml==4.6.5
 mock==1.0.1
 passlib==1.6.2
 psutil==2.1.1
diff --git a/odoo_pip_requirements_python2.7.16_mac.txt b/odoo_pip_requirements_python2.7.16_mac.txt
index 8f99b0111..8aa2b6311 100644
--- a/odoo_pip_requirements_python2.7.16_mac.txt
+++ b/odoo_pip_requirements_python2.7.16_mac.txt
@@ -55,7 +55,7 @@ jcconv==0.2.3
 Jinja2==2.7.3
 lazy-object-proxy==1.3.1
 logilab-common==1.4.0
-lxml==3.3.5
+lxml==4.6.5
 Mako==1.0.0
 Markdown==2.6.8
 MarkupSafe==0.23