diff --git a/lib/spack/docs/requirements.txt b/lib/spack/docs/requirements.txt
index c0c6e077a7ccca..130015159dd009 100644
--- a/lib/spack/docs/requirements.txt
+++ b/lib/spack/docs/requirements.txt
@@ -8,6 +8,6 @@ pygments==2.17.2
 urllib3==2.2.0
 pytest==8.0.0
 isort==5.13.2
-black==24.1.1
+black==24.4.2
 flake8==7.0.0
 mypy==1.8.0