diff --git a/requirements.txt b/requirements.txt
index d7ea4a9..78e8840 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,7 +33,7 @@ toon-format @ git+https://github.com/toon-format/toon-python.git
 pytest>=7.0.0
 pytest-asyncio>=0.21.0
 pytest-cov>=4.1.0
-black==26.3.0
+black==26.5.1
 flake8>=6.0.0
 mypy>=1.0.0
 pre-commit>=3.7.0