diff --git a/src/code2graph/requirements.txt b/src/code2graph/requirements.txt
index e47236ba9..898b41e18 100644
--- a/src/code2graph/requirements.txt
+++ b/src/code2graph/requirements.txt
@@ -14,7 +14,7 @@ selenium==3.141.0
 tensorflow==1.15.0
 urllib3==1.24.1
 wget==3.2
-lxml==4.3.4
+lxml==4.9.1
 showast==0.2.4
 autopep8==1.4.4
 psycopg2==2.8.3