diff --git a/inline_query.py b/inline_query.py
index f2f0cdd..9a2d43b 100644
--- a/inline_query.py
+++ b/inline_query.py
@@ -33,7 +33,7 @@ async def inline_query(update: Update, context: ContextTypes.DEFAULT_TYPE) -> No
 
 
 async def answer_query(update: Update, query: str,
-                       config: ConfigParser, data):
+                       config: ConfigParser, data) -> None:
     characters = humanize_tags_from_json(data['tag_string_character'], "no characters")
     copyrights = humanize_tags_from_json(data['tag_string_copyright'], "unknown copyright")
     artists = humanize_tags_from_json(data['tag_string_artist'], "unknown artist")
@@ -65,7 +65,7 @@ async def answer_query(update: Update, query: str,
     await update.inline_query.answer(results)
 
 
-async def invalid_query(update: Update, query: str):
+async def invalid_query(update: Update, query: str) -> None:
     results = [
         InlineQueryResultArticle(
             id=str(uuid4()),
diff --git a/main.py b/main.py
index 646ece5..49be0a1 100644
--- a/main.py
+++ b/main.py
@@ -33,7 +33,7 @@ def main() -> None:
     application.run_polling(allowed_updates=Update.ALL_TYPES)
 
 
-def validate_config():
+def validate_config() -> None:
     # noinspection PyBroadException
     try:
         response = requests.get(f"https://{config.get('Service', 'Domain')}/profile.json")