diff --git a/lib/spack/docs/requirements.txt b/lib/spack/docs/requirements.txt
index 5a46113dffa2b5..11a6dd6b0aa989 100644
--- a/lib/spack/docs/requirements.txt
+++ b/lib/spack/docs/requirements.txt
@@ -10,4 +10,4 @@ pytest==8.3.4
 isort==5.13.2
 black==24.10.0
 flake8==7.1.1
-mypy==1.11.1
+mypy==1.15.0