diff --git a/pyproject.toml b/pyproject.toml
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,6 +44,7 @@ dependencies = [
     "PyGObject>=3.42.1",
     "aiohttp>=3.8.1",
     "rdfdb @ https://projects.bigasterisk.com/rdfdb/rdfdb-0.23.0.tar.gz",
+    "sse-starlette>=0.10.3",
 ]
 requires-python = ">=3.9"