diff --git a/pyproject.toml b/pyproject.toml
index 79737de8..5d70040c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -46,7 +46,7 @@ version = { attr = "arango.version.__version__" }
 
 [project.optional-dependencies]
 dev = [
-    "black==26.1.0",
+    "black==26.5.1",
     "flake8==7.3.0",
     "isort==5.10.1",
     "mypy==1.15.0",