diff --git a/backend/requirements.txt b/backend/requirements.txt
index 4a94f68..99532f1 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -6,7 +6,7 @@ python-dotenv>=1.0.0
 aiofiles>=23.2.1
 
 # === HTTP 客户端 ===
-httpx>=0.26.0
+httpx>=0.28.1
 openai>=1.10.0
 
 # === 浏览器自动化 ===