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 # Changelog
 
 ## v0.10.4 - 20th June 2019
+ - [Code] Update dependencies behind web interface
  - [API] Optimise `fetch-data` (the action behind the voronoi diagram heatmap) a bit - it's roughly 100ms faster now
      - More speed will be coming soon with the addition of database indexes
- - Update dependencies behind web interface
+ - [API] Add performance counter system, which returns query timing information via the `x-time-taken` HTTP header in the response to most queries
 
 ## v0.10.3 - 13th June 2019
  - [API] Added new [`device-data-recent`](https://aq.connectedhumber.org/__nightdocs/05-API-Docs.html#device-data-recent) action.