diff --git a/requirements.txt b/requirements.txt
index 43d8ead..3547fe5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -61,7 +61,7 @@ kiwisolver==1.0.1
 librosa==0.5.1
 llvmlite==0.25.0
 lmdb==0.94
-lxml==4.2.5
+lxml==4.9.1
 Markdown==2.6.11
 MarkupSafe==1.0
 matplotlib==3.0.2