diff --git a/build/requirements.txt b/build/requirements.txt
index 197cc50..fc4c823 100644
--- a/build/requirements.txt
+++ b/build/requirements.txt
@@ -1,3 +1,3 @@
 wordfreq==2.3.2
-lxml==4.6.3
+lxml==4.9.1
 chardet==4.0.0
\ No newline at end of file