diff --git a/app.py b/app.py
index 0bee6e2..a9b09df 100644
--- a/app.py
+++ b/app.py
@@ -98,8 +98,8 @@ async def proxy(service: str, path: str, request: Request, _=Depends(_verify)):
     headers = dict(request.headers)
     cookies = {}
 
-    # Remove hop-by-hop headers
-    for h in ["host", "content-length", "transfer-encoding"]:
+    # Remove hop-by-hop headers and butler auth (replaced by service auth below)
+    for h in ["host", "content-length", "transfer-encoding", "authorization"]:
         headers.pop(h, None)
 
     # Build auth