diff --git a/pyproject.toml b/pyproject.toml
index 41a958b..03e0be0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,13 +9,13 @@ repository = "https://github.com/kpj/jupyfmt"
 
 [tool.poetry.dependencies]
 python = "^3.8.0"
-black = ">=21.4,<24.0"
+black = ">=21.4,<25.0"
 nbformat = "^5.1.2"
 click = ">=7.1.2,<9.0.0"
 
 [tool.poetry.dev-dependencies]
 bump2version = "^1.0.1"
-black = ">=21.4,<24.0"
+black = ">=21.4,<25.0"
 pytest = "^7.0.0"
 
 [tool.poetry.scripts]