diff --git a/backend/main.py b/backend/main.py
index 5d8ff77..11bb183 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -1102,7 +1102,7 @@ def auth_status():
     """Health check endpoint."""
     return {"status": "ok", "service": "mitai-jinkendo", "version": "v9b"}
 
-@app.post("/api/auth/pin")
+@app.put("/api/auth/pin")
 def change_pin(req: dict, session: dict=Depends(require_auth)):
     """Change PIN/password for current user."""
     pid = session['profile_id']