diff --git a/scripts/lint-commit.py b/scripts/lint-commit.py
index a424e43..a37ed4f 100644
--- a/scripts/lint-commit.py
+++ b/scripts/lint-commit.py
@@ -23,7 +23,9 @@ import sys
 from pathlib import Path
 
 
-def run_command(cmd, check=True):
+def run_command(
+    cmd: list[str], check: bool = True
+) -> subprocess.CompletedProcess[str] | subprocess.CalledProcessError:
     """Run a shell command and return the result."""
     try:
         result = subprocess.run(cmd, capture_output=True, text=True, check=check)
@@ -46,7 +48,11 @@ def check_gitlint_installed():
         sys.exit(1)
 
 
-def lint_commit(commit_hash=None, commit_range=None, staged=False):
+def lint_commit(
+    commit_hash: str | None = None,
+    commit_range: str | None = None,
+    staged: bool = False,
+) -> bool:
     """Lint commit message(s) using gitlint."""
     # Build gitlint command
     cmd = ["gitlint"]