diff --git a/requirements.txt b/requirements.txt
index 8c2da5b..120a3e8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ chardet==3.0.4
 -e git://github.com/aerkalov/ebooklib.git@6a004d4ae3d6da44575a482aa3f605e9484f7b0c#egg=EbookLib
 idna==2.7
 langdetect==1.0.7
-lxml==4.2.4
+lxml==4.9.1
 nltk==3.3
 pyTelegramBotAPI==3.6.6
 pytz==2018.5