diff --git a/pyproject.toml b/pyproject.toml
index 7a0f401..0c073ba 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = [
-    "pytest>=6.2.5,<9.0.0",
+    "pytest>=6.2.5,<10.0.0",
     "pytest-cov>=4.1,<6.0",
     "pytest-env>=0.6.2,<1.3",
 ]