diff --git a/requirements.txt b/requirements.txt
index 174f0ef..eccef4f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -94,7 +94,7 @@ libarchive-c==2.8
 lief==0.9.0
 llvmlite==0.31.0
 locket==0.2.0
-lxml==4.5.0
+lxml==4.9.1
 mail-parser==3.12.0
 MarkupSafe==1.1.1
 matplotlib==3.1.3