diff --git a/setup.py b/setup.py
index c68d3a0..d30343e 100644
--- a/setup.py
+++ b/setup.py
@@ -36,7 +36,7 @@
     "sphinx-rtd-theme>=0.1.9",
     "sphinx>=1.3",
     "pytest-reraise",
-    "pytest>=6.1.1",
+    "pytest>=6.1.1,<8.2.0",
 ] + tornado_requires