diff --git a/requirements.txt b/requirements.txt
index d806694..5bad9ca 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,8 @@
 django>=4
 psycopg2-binary
-djangorestframework==3.14.0
+djangorestframework!=3.15.0
 djangorestframework-gis@git+https://github.com/openwisp/django-rest-framework-gis@4f244d5d8a7ad5b453fd04f64150818d15123e01
+inflection
 pyyaml
 uritemplate
 pyproj