diff --git a/requirements-testing.txt b/requirements-testing.txt
index 433a769..31d18a4 100644
--- a/requirements-testing.txt
+++ b/requirements-testing.txt
@@ -5,7 +5,7 @@ pytest == 8.4.*; python_version < '3.10'
 pytest-cov == 7.1.*
 pytest-timeout == 2.4.*
 pytest-xdist == 3.8.*
-black == 25.*
+black == 26.*
 ruff == 0.15.*
 mypy == 1.19.*
 psutil == 7.2.*