Red Bull is planning to keep its driver line-up of Daniel Ricciardo and Daniil Kvyat next season.
Despite a slow start to the year with just five points in the first five races, Kvyat took Red Bull's best result of the season in Hungary and is currently leads Ricciardo by six points in the drivers' standings. The media linked Ricciardo to Ferrari earlier this year, but with the Italian team opting to retain Kimi Raikkonen, the Australian is unlikely to be bought out of his contract by any of Red Bull's rivals.
"I don't see any reason to change [the driver line-up]," Horner said. "We don't have to be in any rush to make a decision but both the drivers are on long term contracts and it's a successful partnership."
After an upheaval in its engineering team over the winter, Red Bull could be facing its first season since 2008 without a victory if it fails to win a race in the second half of the season. Chief technical officer Adrian Newey has stepped back from day-to-day involvement in the team, while head of aerodynamics Peter Prodromou left for McLaren at the end of last year. However, Horner believes the next generation of Red Bull engineers are starting to shine.
"It's evolution. In any team or business you have to keep evolving, it can't stay static forever. I think the drivers we've got are a very strong pairing, I'm very happy with them. Adrian is still very much involved, in a slightly different manner. We have new talent that is emerging and like in any business, it has to continue to evolve. We're going through that process of evolution."