Rollup 4.62.5

Rollup, the widely used JavaScript module bundler, has released version 4.62.5, a patch update focused on resolving a compact-mode output bug.

Released on August 20, 2026, the new version corrects an issue where compact mode could produce invalid module concatenations, which in turn could break code that consumes the bundled output.

What Changed

According to the official release notes, the fix specifically addresses how semicolons are handled after a replaced default export while minifying, ensuring the resulting bundle remains valid JavaScript when modules are concatenated.

Why It Matters

For teams shipping production bundles in compact mode, this resolves a subtle corruption bug that could surface as runtime errors or malformed output in generated code. It is the kind of low-level fix that prevents hard-to-trace breakage further down the pipeline.

What's Next

Upgrading is straightforward: bump your project's Rollup dependency to 4.62.5 and re-run your build. Projects that do not enable compact mode are unlikely to observe any functional change from this release.