diff --git a/requirements.txt b/requirements.txt
index 9301b06..050b37f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ docopt==0.6.2
 guesslang
 idna==2.7
 jieba==0.39
-lxml==4.2.3
+lxml==4.9.1
 nltk==3.3
 numpy==1.14.5
 Pillow==5.1.0