diff --git a/requirements-dev.txt b/requirements-dev.txt
index 3753ecb9..fca99347 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -5,7 +5,7 @@ pycrypto==2.6.1
 webassets==0.12.1
 factory-boy==2.9.2
 pyquery==1.2.17
-lxml==3.7.3
+lxml==4.6.3
 cssselect==1.0.1
 coverage==4.4.1
 nose==1.3.7