diff --git a/requirements.txt b/requirements.txt
index 014bfe10..0af3a194 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1 @@
-lxml >= 3.8.0, !=4.7.0
+lxml >= 3.8.0, != 4.7.0, < 5.0.0