diff --git a/pyproject.toml b/pyproject.toml
index 8924aa60d..fbf1b8138 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,7 +43,7 @@ dev = [
     "isort",
     "pre-commit",
     "pytest",
-    "pytest-asyncio",
+    "pytest-asyncio<0.22.0",
     "retry",
     "ruff",
     "snmpsim",
diff --git a/tox.ini b/tox.ini
index 0aae9e984..ec78bfd20 100644
--- a/tox.ini
+++ b/tox.ini
@@ -14,7 +14,7 @@ python =
 [testenv]
 deps =
     pytest
-    pytest-asyncio
+    pytest-asyncio<0.22.0
     pytest-cov
     snmpsim
     pyasn1<0.5.0