diff --git a/spcd/__init__.py b/spcd/__init__.py
index 7e46b51..4b9b6a5 100644
--- a/spcd/__init__.py
+++ b/spcd/__init__.py
@@ -76,10 +76,12 @@ def install_python_packages() -> None:
         "pydoclint",
         "pylint",
         "pytest",
+        "PyYAML",
         "ruff",
-        "sphinx",
+        "Sphinx",
         "sphinx-rtd-theme",
         "twine",
+        "types-PyYAML",
     ]
     for package in packages:
         log.info(package)