diff --git a/pyproject.toml b/pyproject.toml
index e956c98e586..1159ea4a072 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,7 +36,7 @@ dependencies = [
   "django-guid>=3.4.0,<3.7",  # Looks like only bugfixes in z-Stream.
   "django-import-export>=2.9,<5.0",
   "django-lifecycle>=1.0,<=1.3.0",
-  "djangorestframework>=3.14.0,<=3.17.1",
+  "djangorestframework>=3.14.0,<3.18",  # API-stable z-Streams. https://www.django-rest-framework.org/community/release-notes/
   "djangorestframework-queryfields>=1.0,<=1.1.0",
   "drf-access-policy>=1.1.2,<1.5.1",
   "drf-nested-routers>=0.93.4,<=0.95.3",