diff --git a/litellm/proxy/_experimental/mcp_server/server.py b/litellm/proxy/_experimental/mcp_server/server.py
index adeacc06f8a..cefe2ef763b 100644
--- a/litellm/proxy/_experimental/mcp_server/server.py
+++ b/litellm/proxy/_experimental/mcp_server/server.py
@@ -1045,7 +1045,9 @@ if MCP_AVAILABLE:
                     except (ValueError, TypeError):
                         pass
                 ttl = _compute_per_user_token_ttl(server, raw_expires)
-                await mcp_per_user_token_cache.set(user_id, server_id, access_token, ttl)
+                await mcp_per_user_token_cache.set(
+                    user_id, server_id, access_token, ttl
+                )
 
             return {"Authorization": f"Bearer {access_token}"}
         except Exception as e: