diff --git a/lib/spack/docs/requirements.txt b/lib/spack/docs/requirements.txt
index 18e2a26f13f..77f919888dd 100644
--- a/lib/spack/docs/requirements.txt
+++ b/lib/spack/docs/requirements.txt
@@ -8,6 +8,6 @@ pygments==2.17.2
 urllib3==2.1.0
 pytest==7.4.4
 isort==5.13.2
-black==23.12.1
+black==24.1.0
 flake8==7.0.0
 mypy==1.8.0