diff --git a/poetry.lock b/poetry.lock
index c2beba2..bbd5a3a 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -2954,4 +2954,4 @@ type = ["pytest-mypy"]
 [metadata]
 lock-version = "2.1"
 python-versions = ">=3.9,<4.0"
-content-hash = "31a1bef3b40287253b9e3cef2244c34cc58f34dad0ce960f717f346f12529a1d"
+content-hash = "7845cd09ab893d3657e7d87bd9483e046b89f0653a5967ac41c2bb2382b3601b"
diff --git a/pyproject.toml b/pyproject.toml
index a38ce3a..2dae257 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -65,10 +65,7 @@ twine = ">=4.0.2"
 freezegun = ">=1.2.2"
 docutils = "<0.21"
 ruff = ">=0.9.3"
-
-[[tool.poetry.source]]
-name = "PyPI"
-priority = "primary"
+backports-asyncio-runner = { "version" = ">=1.2.0", "python" = ">=3.9,<3.11" }
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]