Serato DJ 4.0.2 Released: New Support for AlphaTheta & Reloop Gear

Serato Drops Stability-Focused 4.0.2 Update

On January 25, 2026, Serato rolled out version 4.0.2 for both its DJ Pro and DJ Lite software platforms. This isn't an update packed with flashy new performance features, but rather a crucial maintenance release aimed at enhancing stability and expanding its hardware ecosystem. The key highlights are official integration for two brand-new pieces of hardware and a targeted list of bug fixes that address user-reported issues.

Official Support for New Hardware

The most significant part of the 4.0.2 update is the plug-and-play support for two new devices, allowing DJs to seamlessly integrate them into their Serato setup.

AlphaTheta DJM-V5 Mixer

Official support has been added for the AlphaTheta DJM-V5. This compact 3-channel mixer is a new entry from the parent company of Pioneer DJ, designed for artists who need premium audio quality in a more streamlined format. With this update, the DJM-V5 is now a Serato DJ Pro-enabled device, meaning users can connect directly without needing an external sound card, unlocking full DVS control and software features.

Reloop Flux Go DVS Interface

For the mobile turntablist, the Reloop Flux Go is a game-changer, and Serato 4.0.2 now officially supports it. The Flux Go is an ultra-portable DVS (Digital Vinyl System) interface, likely bus-powered for maximum convenience. This update ensures that DJs using turntables or CDJs on the go can connect to their laptop running Serato with a minimal, reliable setup.

Key Bug Fixes and Performance Enhancements

Beyond new hardware, version 4.0.2 addresses several persistent bugs and improves performance, making for a smoother DJing experience. The development team focused on issues affecting popular hardware and core software functions.

Key fixes in this release include:

• Audio Glitches Resolved: An issue causing audio pops and clicks when using channel filters has been fixed.
• Startup Stability: A potential crash that occurred for some users upon launching the software has been addressed.
• Pioneer DJ DJM-S9: A bug affecting the behavior of FX on this classic battle mixer has been corrected, a welcome fix for the scratch community.
• Pioneer DJ DDJ-FLX10: Users will experience improved performance when using Stems, as a bug causing sluggishness has been squashed.
• NI Traktor Kontrol Z2: The reverse crossfader light now functions correctly, eliminating a confusing visual bug for Z2 owners.
• General Performance: The update also includes under-the-hood improvements to waveform rendering, resulting in smoother scrolling and visual feedback.

Should You Update?

This update is highly recommended for any DJ who has purchased or plans to purchase the AlphaTheta DJM-V5 or Reloop Flux Go. Likewise, if you have been experiencing any of the specific bugs listed above, particularly with the DJM-S9 or DDJ-FLX10, installing 4.0.2 should be a priority.

As always, DJs with critical gigs scheduled in the immediate future should consider waiting a few days to update, allowing time to test the new version with their specific setup in a non-performance environment.