# Pelias Sofware requirements
This is the list of all software requirements for Pelias. We highly recommend using our
[Docker images ](https://hub.docker.com/r/pelias/ ) to avoid having to even attempt to correctly
install all our dependencies yourself.
## Node.js
Most Pelias code is written in Node.js.
Version 8 or newer is required, version 10 is recommended for improved performance.
Pelias generally only adds support for even numbered [LTS ](https://github.com/nodejs/Release#release-schedule ) Node.js versions.
However we gladly accept patches and bug reports regarding issues with any Node.js version that has not reached end-of-life.
## Elasticsearch
Version 2.4 or 5.6
The core data storage for Pelias is Elasticsearch. We recommend the latest in the 2.4 release line.
Support for [Elasticsearch 5 ](https://github.com/pelias/pelias/issues/461 ) is new and should not yet be considered production-ready.
[Elasticsearch 6 ](https://github.com/pelias/pelias/issues/719 ) support will follow once Elasticsearch 5 has been the recommended version for some time.
## SQLite
Version 3.11 or newer
Some components of Pelias need a relational database, and Elasticsearch does not provide good
relational support. We use SQLite in these cases since it's simple to manage and quite performant.
## Libpostal
Pelias relies heavily on the [Libpostal ](https://github.com/openvenues/libpostal#installation )
address parser. Libpostal requires about 4GB of disk space to download all the required data.
## Windows Support
Pelias is not well tested on Windows, but we do wish to support it, and will accept patches to fix
any issues with Windows support.
