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Composer upgrades exposing Magento extension DI failures
Dependency updates can expose incompatible constructors and DI definitions in older extensions. How to find and fix them before they reach production.
By VISIBI Engineering team·Reviewed by Saeed Ak, Co-founder & CTO·Updated 29 September 2026·7 min read
QUICK ANSWER
Dependency updates can expose incompatible constructors and DI definitions in older extensions. How to find and fix them before they reach production.
FROM OUR ENGINEERING WORKREAL CASE
A Composer dependency update exposed constructor and DI definitions in a third-party extension that were incompatible with the newer framework version.
KEY TAKEAWAYS
✓Framework and library updates change interfaces extensions rely on.
✓DI compilation errors often appear only after upgrades.
✓Run di:compile in CI on every dependency change.
Why it happens
Older extensions may declare constructor arguments or preferences that no longer match newer Magento or framework interfaces, causing compilation or runtime failures.
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- Update dependencies on a branch, not production
- Run setup:di:compile and tests in CI
- Check vendor changelogs for breaking changes
- Patch or replace abandoned extensions
- Lock versions with composer.lock
Common mistakes to avoid
✕Starting to build before requirements and success metrics are clear
✕Not owning your code, repositories and accounts
✕Skipping automated tests to save time
✕Choosing technology the market can’t hire for
HOW VISIBI CAN HELP
How we help with development
01DiscoveryClear scope, architecture and estimates before code is written.
02Build in sprintsWeekly demos so you see progress and can change direction.
03Test & releaseAutomated tests and CI/CD for safe, frequent releases.
04SupportNew builds, enhancements, takeovers and ongoing maintenance.
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Frequently asked questions
Can I skip DI compilation?
Not in production mode.
What if the vendor is gone?
We can patch, fork or replace the extension.
Is this part of upgrades?
Yes — compatibility checks are part of every upgrade we run.
SA
Reviewed by Saeed Ak · Co-founder & CTO25 years engineering high-traffic ecommerce, cloud and security platforms. Written by the VISIBI Engineering team.Meet the team →