Most democratic countries still use the traditional systems of paper ballots and voting boxes. As technology develops, new electronic voting systems have been proposed to modernize and facilitate the voting process. Most e-voting systems are based on centralizing models, i.e. client-server structures, which have been proved to be unreliable and prone to be affected by the same problems of any centralized computer system: Denial of Service attacks, server hacking, etc. The advent of cryptocurrencies in recent years has shed light on their underlying technology – blockchain – as a powerful decentralizing technological paradigm that keeps finding new areas of application outside this implementation, such as electronic voting. In this paper, we present a proposal for a voting framework based on blockchain technology and analyze its potential to improve current voting systems as well as the implementation drawbacks.