diff --git a/lib/spack/docs/requirements.txt b/lib/spack/docs/requirements.txt
index 5febc679a2eea6..44a104e04d8653 100644
--- a/lib/spack/docs/requirements.txt
+++ b/lib/spack/docs/requirements.txt
@@ -8,6 +8,6 @@ pygments==2.18.0
 urllib3==2.2.2
 pytest==8.2.2
 isort==5.13.2
-black==24.4.2
+black==24.8.0
 flake8==7.1.0
 mypy==1.10.1