diff --git a/app.py b/app.py
index 56b0eb7..bc7854a 100644
--- a/app.py
+++ b/app.py
@@ -184,7 +184,7 @@ def create_ca(ca_name, common_name, organization, organizational_unit, country,
               created_by):
     # 创建拼音格式的目录名
     pinyin_name = to_pinyin(ca_name)
-    ca_dir = os.path.join(CERT_STORE, f"ca_{pinyin_name}")
+    ca_dir = os.path.join(Config.CERT_STORE, f"ca_{pinyin_name}")
     os.makedirs(ca_dir, exist_ok=True)
 
     # 使用原始common_name作为文件名
@@ -235,7 +235,7 @@ def create_certificate(ca_id, common_name, san_dns, san_ip, organization, organi
         return None
 
     # 创建证书目录
-    cert_dir = os.path.join(CERT_STORE, f"certs_{common_name}")
+    cert_dir = os.path.join(Config.CERT_STORE, f"certs_{common_name}")
     os.makedirs(cert_dir, exist_ok=True)
 
     key_path = os.path.join(cert_dir, f"{common_name}.key")
@@ -1355,7 +1355,7 @@ def generate_separate_files_zip(cert, cert_ext, zip_suffix):
 @login_required
 def download_file(filename):
     # 安全检查：确保文件路径在证书存储目录内
-    file_path = os.path.join(CERT_STORE, filename)
+    file_path = os.path.join(Config.CERT_STORE, filename)
     if not os.path.exists(file_path):
         flash('文件不存在', 'danger')
         return redirect(url_for('index'))