diff --git a/setup.py b/setup.py
index bd96c9b8..8e4ee568 100644
--- a/setup.py
+++ b/setup.py
@@ -25,7 +25,8 @@
     "flake8",
     "flake8_docstrings",
     "mock",
-    "pytest",
+    # doesn't support python 3.8
+    "pytest<1.0",
     "pytest-asyncio",
     "pytest-cov",
     "pytest-mock",
diff --git a/tox.ini b/tox.ini
index f81397d1..9715e28b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -23,7 +23,7 @@ deps =
     flake8_docstrings
     mock
     pytest
-    pytest-asyncio
+    pytest-asyncio<1.0
     pytest-mock
     pytest-random-order
     virtualenv