diff --git a/tox.ini b/tox.ini
index d324119..55e0a22 100644
--- a/tox.ini
+++ b/tox.ini
@@ -32,6 +32,7 @@ deps =
 # w.c.s. dependencies, as it cannot b installed through pip
   quixote>=3,<3.2
   psycopg2-binary<2.9
+  bleach
   vobject
   pyproj
   django-ratelimit<3