diff --git a/requirements.txt b/requirements.txt
index 7006d9c..ca57b55 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,6 +8,6 @@ coverage==4.1
 Sphinx==1.4.8
 mock==2.0.0
 beautifulsoup4==4.4.1
-lxml==4.2.5
+lxml==4.4.0
 pilkit==2.0
 Pillow==4.2.1