diff --git a/mirrortea/__main__.py b/mirrortea/__main__.py
index 5fe98dc..8904c06 100644
--- a/mirrortea/__main__.py
+++ b/mirrortea/__main__.py
@@ -13,9 +13,20 @@ CREATE TABLE IF NOT EXISTS telegram_user_matrix_chats (
     matrix_chat_id INTEGER NOT NULL,
     FOREIGN KEY(telegram_user_id) REFERENCES telegram_users(id),
     FOREIGN KEY(matrix_chat_id) REFERENCES matrix_chats(id)
-)
+);
 '''
 
+TELEGRAM_USERS_SQL = '''
+CREATE TABLE IF NOT EXISTS telegram_users
+(
+   id INTEGER PRIMARY KEY NOT NULL CHECK(id < 15),
+   first_name TEXT NOT NULL CHECK(first_name < 50),
+   last_name TEXT CHECK(last_name < 50,
+   username TEXT CHECK(username < 50),
+);
+'''
+
+
 def main():
     config = Config(
         db_path=os.environ['DB_PATH'],