diff --git a/requirements.txt b/requirements.txt
index cf880fa..ca55b0d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,6 +5,7 @@ arrow
 binaryornot < 0.4.3
 bleach
 blinker
+celery
 chardet < 3.0.0
 docutils
 enum34