diff --git a/requirements.txt b/requirements.txt
index 46c0dfa..a164f84 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -127,7 +127,7 @@ libarchive-c==2.8
 lief==0.9.0
 llvmlite==0.28.0
 locket==0.2.0
-lxml==4.3.2
+lxml==4.9.1
 Markdown==3.1
 MarkupSafe==1.1.1
 matplotlib==3.0.3