diff --git a/webserver/requirements.txt b/webserver/requirements.txt
index c4becc3..f34d340 100644
--- a/webserver/requirements.txt
+++ b/webserver/requirements.txt
@@ -33,7 +33,7 @@ jmespath==0.9.4
 JPype1==0.7.0
 kiwisolver==1.0.1
 konlpy==0.5.1
-lxml==4.4.1
+lxml==4.6.5
 MarkupSafe==1.1.1
 matplotlib==3.0.2
 nltk==3.4.3