diff --git a/app.py b/app.py
index 0b5d535..16c6c1a 100644
--- a/app.py
+++ b/app.py
@@ -232,7 +232,7 @@ def create_certificate(ca_id, common_name, san_dns, san_ip, organization, organi
         if san_ip:
             ip_entries = [ip.strip() for ip in san_ip.split(',') if ip.strip()]
             for i, ip in enumerate(ip_entries, 1):
-                csr_config += f"IP.{i} = {ip}\n
+                csr_config += f"IP.{i} = {ip}\n"
     # 确保配置文件不以空行结尾
     csr_config = csr_config.strip()