diff --git a/poetry.lock b/poetry.lock
index ee1d202..a9790f8 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -605,22 +605,22 @@ testing = ["argcomplete", "attrs (>=19.2.0)", "hypothesis (>=3.56)", "mock", "no
 
 [[package]]
 name = "pytest-asyncio"
-version = "0.21.2"
+version = "0.23.8"
 description = "Pytest support for asyncio"
 optional = false
-python-versions = ">=3.7"
+python-versions = ">=3.8"
 groups = ["dev"]
 files = [
-    {file = "pytest_asyncio-0.21.2-py3-none-any.whl", hash = "sha256:ab664c88bb7998f711d8039cacd4884da6430886ae8bbd4eded552ed2004f16b"},
-    {file = "pytest_asyncio-0.21.2.tar.gz", hash = "sha256:d67738fc232b94b326b9d060750beb16e0074210b98dd8b58a5239fa2a154f45"},
+    {file = "pytest_asyncio-0.23.8-py3-none-any.whl", hash = "sha256:50265d892689a5faefb84df80819d1ecef566eb3549cf915dfb33569359d1ce2"},
+    {file = "pytest_asyncio-0.23.8.tar.gz", hash = "sha256:759b10b33a6dc61cce40a8bd5205e302978bbbcc00e279a8b61d9a6a3c82e4d3"},
 ]
 
 [package.dependencies]
-pytest = ">=7.0.0"
+pytest = ">=7.0.0,<9"
 
 [package.extras]
 docs = ["sphinx (>=5.3)", "sphinx-rtd-theme (>=1.0)"]
-testing = ["coverage (>=6.2)", "flaky (>=3.5.0)", "hypothesis (>=5.7.1)", "mypy (>=0.931)", "pytest-trio (>=0.7.0)"]
+testing = ["coverage (>=6.2)", "hypothesis (>=5.7.1)"]
 
 [[package]]
 name = "pytz"
diff --git a/pyproject.toml b/pyproject.toml
index c63eee5..b0e20ca 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,7 +25,7 @@ io = ["websockets"]
 inflection = "^0.5.0"
 mypy = "^1.0"
 pytest = "^7.0"
-pytest-asyncio = "^0.21.0"
+pytest-asyncio = ">=0.21,<0.24"
 sphinx = "^5.0"
 sphinx-autodoc-typehints = "^1.21"
 sphinx-rtd-theme = ">=1.2,<3.0"