diff --git a/pyproject.toml b/pyproject.toml
index 5cf4b05..976236d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,7 +36,7 @@ dev = [
     "pytest-asyncio>=0.21.0",
     "pytest-cov>=4.1.0",
     "openpyxl>=3.1.0",
-    "black>=23.0.0",
+    "black>=26.5.1",
     "flake8>=6.0.0",
     "mypy>=1.0.0",
 ]