diff --git a/checkers/deer/requirements.txt b/checkers/deer/requirements.txt
index bacf03ce..99d8269b 100644
--- a/checkers/deer/requirements.txt
+++ b/checkers/deer/requirements.txt
@@ -1,2 +1,2 @@
-lxml==4.4.1
+lxml==4.6.3
 requests==2.20.1