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Release Java Edition Bug-fix update Patch of 1.15 Buzzy Bees

Minecraft 1.15.1

Released on 17 December 2019, one week after 1.15 Buzzy Bees, Minecraft Java Edition 1.15.1 addresses stability and performance issues in 1.15. It speeds up chunk rendering, fixes a crash in the Realms screen and stops Anvils from causing a stack overflow error.

Released 17 Dec 2019 Resource pack format 5 Data version 2227
Are my mods ready?

Key takeaways

  • Performance: chunk rendering is faster, especially for chunks with many different block states.
  • Stability: fixes a crash in the Realms screen, an Anvil stack overflow error (MC-167530) and corrupt chunks that made a forced world upgrade fail (MC-167482).
  • No new content: features are unchanged from 1.15 Buzzy Bees.

What changed

PerformanceOptimised chunk rendering, especially for chunks with many different block states.
FixesMC-167530: Anvils caused a java.lang.StackOverflowError.
FixesMC-167482: a corrupt chunk made force-upgrading a world fail.
FixesMC-135050: a NullPointerException occurred while tessellating a block model.
TechnicalFixed an error spammed to the log files when custom spawner blocks spawned villagers, and improved network handling of invalid biome IDs.
RealmsFixed a crash in the Realms screen.

Source: official Java Edition 1.15.1 changelog

Mods & loaders for 1.15.1

Mods must be rebuilt for each version. Counts from the files published on Modrinth and CurseForge, in our catalog.

LoaderMods with a 1.15.1 fileLatest build
Fabric200.20.1
NeoForge7·
Forge5230.0.51
Quilt7·
Shader loadersShaders with a 1.15.1 fileLatest build
Iris51·
OptiFine48·
Popular mods Just Enough Items (JEI) · AvailableFabric API · AvailableOptiFine · Not yet
83 mods in our catalog have a 1.15.1 file →

90 texture packs and 30 maps in our catalog support 1.15.1.

How to play 1.15.1

  1. 01

    Open the Minecraft Launcher and select Minecraft: Java Edition.

  2. 02

    Go to Installations, create a new installation and choose version 1.15.1.

  3. 03

    Back up your worlds before opening them in a new version.

From first snapshot to release

0 snapshots, 1 pre-releases and 0 release candidates over 4 days.

  1. 1.15.1-pre112 Dec 2019
  2. 1.15.117 Dec 2019
All 1 test builds →

Minecraft 1.15.1 FAQ

When was Minecraft 1.15.1 released?

On 17 December 2019, one week after Java Edition 1.15 Buzzy Bees (10 December 2019). It is the first bug-fix release for 1.15.

What does Minecraft 1.15.1 fix?

Stability and performance issues from 1.15: slow chunk rendering, a crash in the Realms screen, an Anvil error and corrupt chunks that blocked a forced world upgrade.

Should I update from 1.15 to 1.15.1?

Yes. It adds no content but makes the game more stable and renders chunks faster. Select Latest Release in the Minecraft Launcher to install it.