diff --git a/buildout.cfg b/buildout.cfg
index 248ff806af78cfa6682b43a2806415598275d20f..7757172ea59a8c4bd15e571e39cb7f7f35edddf8 100644
--- a/buildout.cfg
+++ b/buildout.cfg
@@ -36,6 +36,7 @@ eggs = alabaster
        djangorestframework
        django-rest-swagger
        django-jsonfield
+       django-post_office
        docopt
        docutils
        funcsigs
diff --git a/setup.py b/setup.py
index 344e7921a0057a27abb1ef635b8737890f48bb8d..8c81cdc40e2b242b7516c65f9df8dbf9b5d11002 100644
--- a/setup.py
+++ b/setup.py
@@ -57,6 +57,7 @@ setup(
         "django-guardian",
         "djangorestframework",
         "django-rest-swagger",
+        "django-post_office",
         "docopt",
         "docutils",
         "Jinja2",