diff --git a/backend/open_webui/utils/tools.py b/backend/open_webui/utils/tools.py
index 212d283129..18eb0781f3 100644
--- a/backend/open_webui/utils/tools.py
+++ b/backend/open_webui/utils/tools.py
@@ -1867,7 +1867,7 @@ async def execute_tool_server(
             final_url = final_url.replace(f'{{{key}}}', quote(str(value), safe=''))
 
         if query_params:
-            final_url = f'{final_url}?{urlencode(query_params)}'
+            final_url = f'{final_url}?{urlencode(query_params, doseq=True)}'
 
         request_body_content = operation.get('requestBody', {}).get('content')
         if request_body_content and params: