diff --git a/Ref_Projects/SDC-P5-master/requirements.txt b/Ref_Projects/SDC-P5-master/requirements.txt
index 45478cbd4..884d940f0 100644
--- a/Ref_Projects/SDC-P5-master/requirements.txt
+++ b/Ref_Projects/SDC-P5-master/requirements.txt
@@ -64,7 +64,7 @@ Keras==1.1.2
 lazy-object-proxy==1.2.1
 llvmlite==0.13.0
 locket==0.2.0
-lxml==3.6.4
+lxml==4.9.1
 MarkupSafe==0.23
 matplotlib==1.5.3
 mistune==0.7.3