Bitcoin has quietly reached a major milestone in its quest to reach the masses.

Segregated Witness, or SegWit, the software upgrade designed to speed up bitcoin transactions, is gaining traction. The number of transactions using the technology doubled to more than 30% in just the past three days, according to the SegWit.Party website, which tracks the data.

As bitcoin grew in popularity in the past year, the cryptocurrency’s network became clogged, making transaction times and fees soar. In December, transaction costs climbed to as high as US$55, according to BitInfoCharts. SegWit is meant to solve that problem by taking some of the work needed to confirm transactions off the main chain, speeding up the process.

Major crypto-asset exchanges Coinbase and Bitfinex started using SegWit this month, helping to speed up adoption. The upgrade was first released in August.

Transaction fees have dropped to a four-month low of $2, though confirmed transactions per day have also dropped to around 200 000 from more than double that number in December. –– Reported by Camila Russo, (c) 2018 Bloomberg LP