diff --git a/tox.ini b/tox.ini
index dcebb050..4ec1aa6b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,6 +16,7 @@ deps =
     chardet<=2.3.0
     beautifulsoup4
     gunicorn
+    itsdangerous
 commands =
     pytest tests --cov sanic --cov-report term-missing {posargs}