diff --git a/pyproject.toml b/pyproject.toml
index e2c9f63..6144f04 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,7 +27,7 @@ dependencies = [
 dev = [
     "pytest>=8.0.0",
     "pytest-asyncio>=0.23.0",
-    "black>=24.0.0",
+    "black>=26.5.1",
     "mypy>=1.10.0",
     "ruff>=0.4.0",
 ]
diff --git a/requirements-dev.txt b/requirements-dev.txt
index a23e2fd..038a1ba 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -2,7 +2,7 @@
 -r requirements.txt
 pytest>=9.0.3
 pytest-asyncio>=1.4.0
-black>=24.0.0
+black>=26.5.1
 mypy>=1.8.0
 flake8>=7.0.0