diff --git a/requirements.txt b/requirements.txt
index 4bba850e2..cb6e33f27 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ coverage==3.5.2
 cssselect==0.7.1
 docutils==0.9.1
 fuzzywuzzy==0.1
-lxml
+lxml==3.4.4
 mock==1.0b1
 mox==0.5.3
 nose==1.1.2