diff --git a/requirements.txt b/requirements.txt
index 376c2af..7cd2fcb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,3 +24,4 @@ SQLAlchemy==1.2.7
 urllib3==1.22
 Werkzeug==0.14.1
 whitenoise==3.3.1
+itsdangerous==0.24