diff --git a/requirements-rtd.txt b/requirements-rtd.txt
index d3882431..530cf365 100644
--- a/requirements-rtd.txt
+++ b/requirements-rtd.txt
@@ -1,4 +1,4 @@
-lxml==4.8.0
+lxml==4.9.3
 pycryptodomex==3.14.1
 construct==2.10.68
 argon2-cffi==21.3.0
diff --git a/requirements.txt b/requirements.txt
index ca8e7a65..64ab1073 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-lxml==4.8.0
+lxml==4.9.3
 pycryptodomex==3.14.1
 construct==2.10.68
 argon2-cffi==21.3.0