diff --git a/requirements.txt b/requirements.txt
index fe60a1afa..7e40a4347 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 setuptools
-lxml>=4.3.0
+lxml>=4.3.0, <5.0.0
 numpy>=1.12.0
 webrtcvad-wheels>=2.0.10
-Pillow>=9.0.0 --only-binary=Pillow
\ No newline at end of file
+Pillow>=9.0.0 --only-binary=Pillow