diff --git a/pyproject.toml b/pyproject.toml
index 9fe7adb..62c71a4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,7 +37,7 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = [
-    "black (>=26.3.1,<26.4.0)",
+    "black (>=26.5.1,<26.6.0)",
     "build (>=1.4.4,<1.5.0)",
     "coverage>=7.13.5",
     "isort (>=8.0.1,<8.1.0)",