diff --git a/requirements.txt b/requirements.txt
index aeb8544e..23c48b32 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ flake8==6.1.0
 requests-mock==1.11.0
 Sphinx<8
 sphinx_rtd_theme==2.0.0
-lxml==5.0.0
+lxml==5.1.0
 requests==2.31.0
 xmlschema==2.5.1
 jinja2==3.1.2
diff --git a/setup.py b/setup.py
index b837d6ae..2a88b3eb 100644
--- a/setup.py
+++ b/setup.py
@@ -10,7 +10,7 @@
     changelog = f.read()
 
 requires = [
-    'lxml>=5.0.0',
+    'lxml>=5.1.0',
     'defusedxml',
     'requests',
     'xmlschema'