Currently by default, Terragrunt support is limited to Terraform registry sources and GitHub sources that include SemVer refs, e.g. like `github.com/hashicorp/example?ref=v1.0.0`.

You can create a custom [versioning config](../../../configuration-options.md#versioning) to support non-SemVer references.
For example, if you want to reference a tag like `module-v1.2.5`, a block like this would work:

```json
{
  "terragrunt": {
    "versioning": "regex:^((?<compatibility>.*)-v|v*)(?<major>\\d+)\\.(?<minor>\\d+)\\.(?<patch>\\d+)$"
  }
}
```

Pinned Terragrunt dependencies like the following will get a PR whenever there is a newer version available:

```hcl
terraform {
  source = "github.com/hashicorp/example?ref=v1.0.0"
}
```

### Terraform lockfiles

The Terragrunt manager supports [lock file maintenance](../../../configuration-options.md#lockfilemaintenance) for `.terraform.lock.hcl` artifacts.
These artifacts will be updated if and only if the update type is `lockFileMaintenance`.