diff --git a/pyproject.toml b/pyproject.toml
index dbd84ed7..dc7c7f6e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -124,7 +124,7 @@ path = "src/dnadiffusion/__about__.py"
 [tool.hatch.envs.default]
 python = "3.10"
 dependencies = [
-    "black==23.9.1",
+    "black==23.10.1",
     "black[jupyter]",
     "mkdocs-material==9.3.1",
     "mkdocstrings==0.23.0",