diff --git a/requirements.txt b/requirements.txt
index e222a11..4d5efb1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ PyExecJS==1.5.1
 configparser==5.0.0
 setuptools>=41.0.0
 six>=1.12.0
-lxml==4.2.5
+lxml==4.6.5
 gensim==3.8.1
 nltk==3.5
 matplotlib==2.2.3