v8.13.4

8.13.4 (2025-11-06)

Release Type: ⚠️ REQUIRED
Migration Required: ❌ No
Compatibility: ✅ Backward compatible with v8.x.x

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Release Summary

Version 8.13.4 is a bug fix release that adds support for Clarity 4 transactions, which will be a part of the upcoming Stacks 3.3 hard fork activation. This upgrade is mandatory for all Stacks API installations in order to avoid outage when Stacks 3.3 activates.

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What's Changed

Bug Fixes

• Fixed: upgrade to latest stacks-encoding-native-js with arm64 support (#2376)
  • Impact: Supports decoding Stacks transactions that use Clarity version 4
  • Resolution: (5ab7328)

Infrastructure & Maintenance

• GLIBC System Dependency Change - This release requires version 2.33 of GLIBC is installed on the machine where it's running. This only affects users running the Stacks Blockchain API binary in their own Docker image or directly on a machine. If using the Hiro Systems Docker image docker.io/hirosystems/stacks-blockchain-api:8.13.4, there should be no impact.

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Breaking Changes

None - This is a backward-compatible release.

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Upgrade Priority

User Type	Priority	Recommended Timeline
Production API Operators	High	As soon as possible
Development Teams	High	As soon as possible
High-Traffic Applications	High	As soon as possible