diff --git a/analyzers/dart-analyze/utils/issue_gen.py b/analyzers/dart-analyze/utils/issue_gen.py
index e9ba9083..210a3d9f 100644
--- a/analyzers/dart-analyze/utils/issue_gen.py
+++ b/analyzers/dart-analyze/utils/issue_gen.py
@@ -42,7 +42,8 @@ def update_issues(issues: List[Issue]) -> None:
             f.write(content)
 
 
-def main():
+def main() -> None:
+    """Entrypoint for this script."""
     extractor = IssueExtractor()
     issues = extractor.issues
     update_issues(issues=issues)
diff --git a/analyzers/dart-analyze/utils/issue_map_gen.py b/analyzers/dart-analyze/utils/issue_map_gen.py
index af246daf..274c21fe 100644
--- a/analyzers/dart-analyze/utils/issue_map_gen.py
+++ b/analyzers/dart-analyze/utils/issue_map_gen.py
@@ -49,7 +49,8 @@ def generate_mapping(issues: List[Issue]) -> Dict[str, Dict[str, str]]:
     return issue_map
 
 
-def main():
+def main() -> None:
+    """Entrypoint for this script."""
     extractor = IssueExtractor()
     issues = extractor.issues
     generate_mapping(issues=issues)