diff --git a/lib/spack/docs/requirements.txt b/lib/spack/docs/requirements.txt
index 6d14c83c32..8c4be0902c 100644
--- a/lib/spack/docs/requirements.txt
+++ b/lib/spack/docs/requirements.txt
@@ -10,4 +10,4 @@ pytest==7.4.3
 isort==5.13.2
 black==23.12.0
 flake8==6.1.0
-mypy==1.7.1
+mypy==1.8.0