diff --git a/requirements.txt b/requirements.txt
index d778de5..a4d8229 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,6 +13,7 @@ itsdangerous==1.1.0
 requests>=2.20.0
 PyMySQL==0.9.3
 gunicorn==19.9.0
+banal==0.4.2
 normality==2.0.0
 dataset==1.1.2
 mistune==0.8.4