diff --git a/pyproject.toml b/pyproject.toml
index c6de81e..2bab90f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -141,7 +141,7 @@ dev = [
     "pytest>=9.0.2,<10.0.0",  # 필수 의존성에서 이동됨
     "pytest-asyncio>=0.21.0,<2.0.0",
     "pytest-cov>=4.0.0,<5.0.0",
-    "black>=23.0.0,<26.0.0",
+    "black>=23.0.0,<27.0.0",
     "ruff>=0.1.0,<1.0.0",
     "mypy>=1.0.0,<2.0.0",
     "beanllm[cli]", # Add CLI development tools