diff --git a/requirements.txt b/requirements.txt
index 75194225f5..f928c8ac30 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ chardet==3.0.4
 click==7.1.1
 idna==2.9
 joblib==0.14.1
-lxml==4.5.0
+lxml==4.9.1
 nltk==3.5
 numpy==1.18.2
 pandas==1.0.3