diff --git a/.editorconfig b/.editorconfig
index 6a9a5c45d..d8719a1e5 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -12,7 +12,7 @@ trim_trailing_whitespace = true
 indent_style = space
 indent_size = 4
 
-[*.{html,css,scss,json,yml,xml}]
+[*.{html,css,scss,json,yml,xml,toml}]
 indent_style = space
 indent_size = 2
 
diff --git a/scripts/ruff_version.py b/scripts/ruff_version.py
index ca12be7e6..e280cef42 100644
--- a/scripts/ruff_version.py
+++ b/scripts/ruff_version.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import subprocess
 from pathlib import Path
 
@@ -10,7 +12,7 @@ PRE_COMMIT_CONFIG = TEMPLATED_ROOT / ".pre-commit-config.yaml"
 PYPROJECT_TOML = ROOT / "pyproject.toml"
 
 
-def main():
+def main() -> None:
     new_version = get_requirements_txt_version()
     old_version = get_pyproject_toml_version()
     if old_version == new_version:
@@ -20,23 +22,23 @@ def main():
     subprocess.run(["uv", "lock", "--no-upgrade"], cwd=ROOT, check=False)  # noqa: S603,S607
 
 
-def get_requirements_txt_version():
+def get_requirements_txt_version() -> str:
     content = REQUIREMENTS_LOCAL_TXT.read_text()
     for line in content.split("\n"):
         if line.startswith("ruff"):
             return line.split(" ")[0].split("==")[1]
-    return None
+    raise RuntimeError("Could not find ruff version in requirements/local.txt")
 
 
-def get_pyproject_toml_version():
+def get_pyproject_toml_version() -> str:
     data = tomllib.loads(PYPROJECT_TOML.read_text())
     for dependency in data["project"]["dependencies"]:
         if dependency.startswith("ruff=="):
             return dependency.split("==")[1]
-    raise RuntimeError("Could not find version in pyproject.toml")
+    raise RuntimeError("Could not find ruff version in pyproject.toml")
 
 
-def update_ruff_version(old_version, new_version):
+def update_ruff_version(old_version: str, new_version: str) -> None:
     # Update pyproject.toml
     new_content = PYPROJECT_TOML.read_text().replace(
         f"ruff=={old_version}",