diff --git a/lib/spack/docs/requirements.txt b/lib/spack/docs/requirements.txt
index 4744d1339c0..6d95f1d40d1 100644
--- a/lib/spack/docs/requirements.txt
+++ b/lib/spack/docs/requirements.txt
@@ -10,4 +10,4 @@ pytest==7.4.2
 isort==5.12.0
 black==23.9.1
 flake8==6.1.0
-mypy==1.5.1
+mypy==1.6.0