diff --git a/application/requirements.txt b/application/requirements.txt
index 26a8dd49..2ac40ab6 100644
--- a/application/requirements.txt
+++ b/application/requirements.txt
@@ -9,7 +9,7 @@ hupper==1.12.1
 iso8601==2.1.0
 itsdangerous==2.1.2
 Jinja2==3.1.4
-lxml==4.9.4
+lxml==5.3.0
 MarkupSafe==2.1.3
 Paste==3.10.1
 PasteDeploy==3.0.1
diff --git a/deployment/roles/briefkasten/files/requirements.txt b/deployment/roles/briefkasten/files/requirements.txt
index 637c47da..c52ccc93 100644
--- a/deployment/roles/briefkasten/files/requirements.txt
+++ b/deployment/roles/briefkasten/files/requirements.txt
@@ -9,7 +9,7 @@ hupper==1.12.1
 iso8601==2.1.0
 itsdangerous==2.1.2
 Jinja2==3.1.4
-lxml==4.9.4
+lxml==5.3.0
 MarkupSafe==2.1.3
 Paste==3.10.1
 PasteDeploy==3.0.1