diff --git a/tox.ini b/tox.ini
index 2d15019..f49bd41 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,9 +4,10 @@
 
 [testenv]
 deps =
-	lxml!=4.2.0
 	pygost
 	pyyaml
+	py34: lxml!=4.2.0,<4.4.0
+	py27,py35,py36,py37,pypy,pypy3: lxml!=4.2.0
 	py27,py34,py35,pypy: pyblake2
 	py27,py34,py35,pypy: pysha3
 setenv =