diff --git a/lib/spack/docs/requirements.txt b/lib/spack/docs/requirements.txt
index cb766413d951c3..196ee2d27e473c 100644
--- a/lib/spack/docs/requirements.txt
+++ b/lib/spack/docs/requirements.txt
@@ -10,4 +10,4 @@ pytest==8.3.3
 isort==5.13.2
 black==24.8.0
 flake8==7.1.1
-mypy==1.11.1
+mypy==1.12.1