diff --git a/src/backend/requirements.txt b/src/backend/requirements.txt
index 33a2ee0..76723fb 100644
--- a/src/backend/requirements.txt
+++ b/src/backend/requirements.txt
@@ -1,14 +1,27 @@
-fastapi>=0.95.2
-uvicorn>=0.22.0
-python-dotenv>=1.0.0
-requests>=2.28.2
-paramiko>=3.3.0
-pydantic>=1.10.7
-loguru>=0.7.0
-python-nmap>=0.7.1
-tenacity>=9.1.2
-typing-extensions>=4.0.0
-aiofiles>=24.1.0
-telnetlib3>=2.0.4
-asyncssh>=2.14.0
-aiofiles>=24.1.0
\ No newline at end of file
+# 核心依赖
+fastapi==0.110.0
+uvicorn==0.29.0
+python-dotenv==1.0.1
+
+# Pydantic 模型
+pydantic==2.6.4
+pydantic-settings==2.2.1
+
+# 网络操作
+asyncssh==2.14.2
+telnetlib3==2.0.3
+httpx==0.27.0
+python-nmap==0.7.1
+
+# 异步文件操作
+aiofiles==23.2.1
+
+# 日志管理
+loguru==0.7.2
+
+# 重试机制
+tenacity==8.2.3
+
+# 其他工具
+asyncio==3.4.3
+typing_extensions==4.10.0
\ No newline at end of file