diff --git a/requirements.txt b/requirements.txt
index 96f7ec4..d250a5a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -94,7 +94,7 @@ librosa==0.6.3
 llvmlite==0.28.0
 lmdb==0.98
 louis==3.5.0
-lxml==4.2.6
+lxml==4.9.1
 macaroonbakery==1.1.3
 Mako==1.0.7
 Markdown==3.0.1