diff --git a/requirements.txt b/requirements.txt
index d2e9a0d..03b20c3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,6 +8,7 @@ Flask-Bcrypt==0.7.1
 Flask-Login==0.5.0
 Flask-Migrate==2.5.3
 Flask-SQLAlchemy==2.4.4
+Flask-Static-Digest==0.1.3
 Flask-WTF==0.14.3
 itsdangerous==1.1.0
 Jinja2==2.11.2