diff --git a/requirements.txt b/requirements.txt
index 13ee6e3..491b689 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ itsdangerous==1.1.0
 Jinja2==2.11.2
 joblib==0.15.1
 kiwisolver==1.2.0
-lxml==4.4.2
+lxml==4.6.3
 MarkupSafe==1.1.1
 matplotlib==3.2.1
 mkl-fft==1.0.15