diff --git a/requirements.txt b/requirements.txt
index be0065e..4d1355b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 git+git://github.com/adlpr/pymarc.git@master#egg=pymarc
-lxml==4.6.2
+lxml==4.9.1
 regex==2019.8.19
 tqdm==4.36.1
 loguru==0.3.2
diff --git a/setup.py b/setup.py
index 8c7f287..21896f9 100644
--- a/setup.py
+++ b/setup.py
@@ -19,7 +19,7 @@
     packages = find_packages(),
     python_requires='>=3.7',
     install_requires = ['pymarc==3.1.L',
-                        'lxml==4.6.2',
+                        'lxml==4.9.1',
                         'regex==2019.8.19',
                         'tqdm==4.36.1',
                         'loguru==0.3.2'],