diff --git a/requirements/prod.txt b/requirements/prod.txt
index 2d489ef..1f7a3b2 100644
--- a/requirements/prod.txt
+++ b/requirements/prod.txt
@@ -5,7 +5,7 @@ RelStorage[postgresql]==2.1.1
 urllib3>=1.24.1,<2.0
 keyring>=17.0.0,<22.0
 kombu>=4.2.1
-lxml>=4.2.5,<5.0
+lxml==6.0.2
 lz4>=2.1.2,<4.0
 openpyxl>=2.5.0,<4.0
 pyexcel>=0.5.15,<0.7.0