This page describes how to upgrade the Nextstrain CLI–the nextstrain command–itself, without also upgrading the entire Nextstrain runtime.

The way to upgrade depends on what kind of Nextstrain CLI installation you have (i.e. how it was first installed), so running nextstrain check-setup:

$ nextstrain check-setup
A new version of nextstrain-cli, X.Y.Z, is available!  You're running A.B.C.

See what's new in the changelog:


Upgrade by running:


Testing your setup…

will suggest a command to run to upgrade nextstrain, if there are any upgrades available. Run the suggested command to perform the upgrade.

Afterwards, you can check that the new version was installed by running:

$ nextstrain version
nextstrain.cli X.Y.Z