diff --git a/Crawler_decomposition/requirements.txt b/Crawler_decomposition/requirements.txt
index 962c555..d182156 100644
--- a/Crawler_decomposition/requirements.txt
+++ b/Crawler_decomposition/requirements.txt
@@ -2,6 +2,6 @@ beautifulsoup4==4.6.0
 certifi==2018.4.16
 chardet==3.0.4
 idna==2.6
-lxml==4.2.1
+lxml==4.6.3
 requests==2.18.4
 urllib3==1.22