diff --git a/database.py b/database.py
index 0caea1f..a1f7707 100644
--- a/database.py
+++ b/database.py
@@ -11,15 +11,8 @@ load_dotenv()
 
 DB_PATH = Path(__file__).parent / "quiz_app.db"
 
-load_dotenv()
-
-db_name = os.getenv("DB_NAME")
-db_user = os.getenv("DB_USER")
-db_password = os.getenv("DB_PASSWORD")
-db_host = os.getenv("DB_HOST", "localhost")
-db_port = os.getenv("DB_PORT", "5432")
-
-DATABASE_URL = f"postgresql://{db_user}:{db_password}@{db_host}:{db_port}/{db_name}"
+# SQLite 데이터베이스 URL 설정
+DATABASE_URL = f"sqlite:///{DB_PATH}"
 
 engine = create_engine(DATABASE_URL, echo=True)
 SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
@@ -303,8 +296,8 @@ def migrate_database():
         # 기존 데이터 마이그레이션
         cursor.execute("""
         INSERT INTO learning_history 
-        (user_id, group_code, score, total_questions, timestamp)
-        SELECT user_id, group_code, score, total_questions, timestamp
+        (user_id, group_code, score, total_questions, question_content, feedback, user_choice, correct_answer, timestamp)
+        SELECT user_id, group_code, score, total_questions, question_content, feedback, user_choice, correct_answer, timestamp
         FROM learning_history_old
         """)
         
@@ -320,6 +313,15 @@ def migrate_database():
         if conn:
             conn.close()
 
+# Initialize database when module is imported
+init_db()
+# Migrate database to new schema
+migrate_database() 
+        return False
+    finally:
+        if conn:
+            conn.close()
+
 # Initialize database when module is imported
 init_db()
 # Migrate database to new schema