diff --git a/pyproject.toml b/pyproject.toml
index 15af4ceed8eaaeda6cc036df444ebad6fca3f4c4..72db250b5bebaf41fcd9bd8e8a58f8174f4b5bb8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,6 +29,7 @@ aleksis-core = "^2.7"
 django-iban-field = "^0.8"
 django-formtools = "^2.3"
 django-starfield = "^1.0"
+aleksis-app-postbuero = "1.0+20220218233830.a212f707"
 
 [tool.poetry.dev-dependencies]
 aleksis-builddeps = "*"