diff --git a/requirements.txt b/requirements.txt
index 74e6adb7..1664d832 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -39,6 +39,7 @@ flower==0.9.2
 unidecode
 factory-boy==2.11.1
 pyvirtualdisplay==0.2.1
+tornado==5.1.1
 selenium
     # sudo apt-get install xvfb
     # sudo apt-get install libappindicator3-1 fonts-liberation