diff --git a/lib/spack/docs/requirements.txt b/lib/spack/docs/requirements.txt
index 0b3db49707e..457fe02f2b5 100644
--- a/lib/spack/docs/requirements.txt
+++ b/lib/spack/docs/requirements.txt
@@ -8,6 +8,6 @@ pygments==2.17.2
 urllib3==2.2.1
 pytest==8.1.1
 isort==5.13.2
-black==24.2.0
+black==24.3.0
 flake8==7.0.0
 mypy==1.9.0