diff --git a/requirements.txt b/requirements.txt
index c60abbe..76edc1e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 joblib==0.14.1
-lxml==4.5.0
+lxml==4.9.1
 mongoengine==0.10.6
 nltk==3.4.5
 nose==1.3.7