diff --git a/requirements.txt b/requirements.txt
index c171e90..a9d57db 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,6 +14,6 @@ numpy==1.18.1
 pandas
 
 PriceIndices==1.1.1
-lxml==4.5.0
+lxml==4.9.1
 
 requests
\ No newline at end of file