diff --git a/pyproject.toml b/pyproject.toml
index 520eb0b..0f07f95 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -190,7 +190,7 @@ hpc = [
 dev = [
     "pytest>=8.0.0",
     "pytest-asyncio>=0.23.0,<2.0",
-    "black>=22.0.0,<26.0",
+    "black>=22.0.0,<27.0",
     "mypy>=1.0.0,<2.0",
     "ruff>=0.1.0",
     "isort>=5.0.0",