diff --git a/pyproject.toml b/pyproject.toml
index 23d9939f..2aadcc95 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -68,7 +68,7 @@ include = ["PackLab*"]
 
 [project.optional-dependencies]
 testing = [
-    "pytest>=8,<9",
+    "pytest>=8,<10",
     "pytest-cov>=5,<7",
     "pytest-json-report==1.5.0",
     "coverage>=7.6,<8",