diff --git a/pyproject.toml b/pyproject.toml
index 536b319..ec12c54 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -72,7 +72,7 @@ dev = [
     "pytest-subtests",
     "pytest-asyncio",
     "tiktoken",
-    "black==26.1.0",
+    "black==26.3.1",
     "ruff==0.8.3",
     "mypy",
     "types-PyYAML",
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 8b44792..f932d7d 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -5,7 +5,7 @@ pytest-asyncio==0.25.3
 tiktoken==0.12.0
 fastmcp<3
 build
-black==26.1.0
+black==26.3.1
 ruff==0.5.6
 mypy==1.10.0
 types-PyYAML==6.0.12.20240311