diff --git a/requirements.txt b/requirements.txt
index 75bb67e..60619e7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -45,7 +45,7 @@ jmespath==0.9.3
 joblib==0.11
 line-profiler==2.0
 llvmlite==0.19.0
-lxml==3.5.0
+lxml==4.6.5
 MarkupSafe==1.0
 matplotlib==2.0.2
 multiprocess==0.70.5