diff --git a/celery_singleton/config.py b/celery_singleton/config.py
index 55e51ba..fdd929b 100644
--- a/celery_singleton/config.py
+++ b/celery_singleton/config.py
@@ -31,7 +31,7 @@ def backend_url(self):
         if url is not None:
             return url
         url = self.app.conf.get("result_backend")
-        if not url or not url.startswith("redis://"):
+        if not url or not url.startswith("redis://") or not url.startswith("rediss://"):
             url = self.app.conf.get("broker_url")
         return url