diff --git a/pyproject.toml b/pyproject.toml
index c2fb29e..8c41aa5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = [
-  "pytest>=7.4,<8.0",
+  "pytest>=7.4,<10.0",
   "pytest-asyncio>=0.21,<1.0",
   "anyio>=3.7,<4.0"
 ]