diff --git a/requirements.txt b/requirements.txt
index 7fd7b98ca..7e7bdd97f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -52,7 +52,7 @@ inotify-simple==1.3.5; python_version >= '2.7' and python_version not in '3.0, 3
 inotifyrecursive==0.3.5
 joblib==1.0.1; python_version >= '3.6'
 langdetect==1.0.9
-lxml==4.6.3; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
+lxml==4.9.1; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
 msgpack==1.0.2
 numpy==1.20.3
 ocrmypdf==12.3.2