diff --git a/pyproject.toml b/pyproject.toml
index 00d81d1..1e16844 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ tests = [
     "mypy >= 1.3,< 2.0",
     "pycodestyle ~= 2.6",
     "PyHamcrest ~= 2.0",
-    "pytest >= 6,< 8",
+    "pytest >= 6,< 9",
     "pytest-asyncio ~= 0.14",
 ]