Does jms/serializer-bundle support Symfony 7.4 and 8.1?
Allows you to easily serialize, and deserialize data of any complexity
yes Yes, jms/serializer-bundle supports Symfony 7.4 since 5.4.0. It also supports Symfony 8.1 since 5.5.2.
Latest stable release: 5.5.2 (2025-11-25) · PHP ^7.4 || ^8.0 · 97,320,100 downloads · checked 2026-11-09.
Support per Symfony branch
| Symfony | Latest release allows it | First release that allows it | Symfony branch status |
|---|---|---|---|
| 5.4 LTS | yes | 3.5.0 | bug fixes until 2024-11, security until 2029-02, needs PHP ≥ 7.2.5 |
| 6.4 LTS | yes | 4.0.0 | bug fixes until 2026-11, security until 2027-11, needs PHP ≥ 8.1.0 |
| 7.4 LTS | yes | 5.4.0 | bug fixes until 2028-11, security until 2029-11, needs PHP ≥ 8.2.0 |
| 8.1 | yes | 5.5.2 | bug fixes until 2027-01, security until 2027-01, needs PHP ≥ 8.4.0 |
Based on the require constraints each release publishes on Packagist. "Allows" means the constraint accepts the first release of that branch; it does not prove the maintainers tested it. The same rule the upgrade scan applies to your composer.lock.
What the upgrade means for jms/serializer-bundle
Maintained, but annotation-based configuration must move to attributes together with the rest of the codebase.
Replacement: Attributes, or Symfony Serializer
Is jms/serializer-bundle blocking your upgrade?
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All bundle compatibility pages · jms/serializer-bundle on Packagist · Also in Deutsch