diff --git a/main.py b/main.py
index a610564..8077a6b 100644
--- a/main.py
+++ b/main.py
@@ -1822,8 +1822,10 @@ async def download_inp(name: str, response: Response):
    
 # DingZQ, 2024-12-28, convert v3 to v2
 @app.get("/convertv3tov2/",response_model=None)
-async def fastapi_convert_v3_to_v2(inp: str) -> ChangeSet:
+async def fastapi_convert_v3_to_v2(req: Request) -> ChangeSet:
     network = 'v3Tov2'
+    jo_root = await req.json()
+    inp = jo_root['inp']
     cs = convert_inp_v3_to_v2(inp)
     
     op = cs.operations[0]