# Default swift language version for a given toolchain version **URL:** \ **Category:** Discussion\ **Created:** [April 5, 2024, 6:47am UTC](https://forums.swift.org/t/default-swift-language-version-for-a-given-toolchain-version/71100 "2024-04-05T06:47:23Z")\ **Posts on this page:** 1\ **Showing post:** 11
**Author:** ![hassila](https://sea2.discourse-cdn.com/swift/user_avatar/forums.swift.org/hassila/32/22647_2.png) [@hassila](https://forums.swift.org/u/hassila)\ **Post date:** [April 5, 2024, 11:00pm UTC](https://forums.swift.org/t/default-swift-language-version-for-a-given-toolchain-version/71100/11 "2024-04-05T23:00:15Z")
Then I think we are on the same page too, I got the impression that it wouldn’t be enough to just edit the tools version in a package manifest to get the new language mode, which would have been a bit unexpected. I can understand the pragmatism of not wanting to change the default version when using the compiler directly, but that’ll mean then that version 5 is basically forever the default? Swift toolchain version 10 would then still default to swift language version 5 with the same argument - to not break any old code out there.that will over time be stranger and stranger… Perhaps should start issuing a warning if the language version isn’t specifically specified from the command line? Or as a fix-it if trying to use new features (which might be hard?). Just seems like a nice experience for someone who wants to build a single file to test the language out would get the version of the language that is current and not a “random” version from years ago which might not then compile? --- _[View the full topic](https://forums.swift.org/t/default-swift-language-version-for-a-given-toolchain-version/71100)._