diff --git a/pyproject.toml b/pyproject.toml
index 26d919b..fa3fd5b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -63,7 +63,7 @@ dependencies = [
 agrag = "agrag.main:ag_rag"
 
 [project.optional-dependencies]
-tests = ["pytest", "pytest-mock", "tox", "black>=23.1.9, <=24.10.0", "isort>=5.11.0, <=5.13.2"]
+tests = ["pytest", "pytest-mock", "tox", "black>=23.1.9, <=24.10.0", "isort>=5.11.0, <=6.0.0"]
 
 # Testing and formatting configurations
 [tool.black]