diff --git a/api/backup/pyproject.toml b/api/backup/pyproject.toml
index 7bbcdb2..9264714 100644
--- a/api/backup/pyproject.toml
+++ b/api/backup/pyproject.toml
@@ -14,7 +14,7 @@ dev = [
     "pytest>=8.0.0",
     "pytest-cov>=6.0.0",
     "ruff>=0.8.0",
-    "black>=24.0.0",
+    "black>=26.3.1",
 ]
 
 [build-system]