diff --git a/pyproject.toml b/pyproject.toml
index 28044d6..cabb062 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,7 +27,7 @@ api = [
 ]
 dev = [
   "httpx>=0.28,<1.0",
-  "pytest>=8.3,<9.0",
+  "pytest>=8.3,<10.0",
   "ruff>=0.11,<1.0",
 ]