diff --git a/requirements.txt b/requirements.txt
index 116363d..7f4209d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ fastapi==0.104.1
 h11==0.14.0
 idna==3.4
 isodate==0.6.1
-lxml==4.9.3
+lxml==5.1.1
 pydantic==2.3.0
 pydantic_core==2.6.3
 pyparsing==3.1.1