diff --git a/data_gen/OpenLabeling/requirements.txt b/data_gen/OpenLabeling/requirements.txt
index 9733348..c0d16d4 100644
--- a/data_gen/OpenLabeling/requirements.txt
+++ b/data_gen/OpenLabeling/requirements.txt
@@ -1,4 +1,4 @@
-lxml==4.3.0
+lxml==4.9.1
 numpy==1.16.0
 opencv-contrib-python==3.4.5.20
 tqdm==4.29.1