# How do I pin a range of allowable versions with both a minimum and maximum?

I am working on a module that depends on [Pester major version 4](https://pester-docs.netlify.app/docs/v4/introduction/installation). I would like to enforce in the module manifest that any major version 4 is acceptable, but nothing in v3 and nothing in v5.

If I declare in my manifest...

```powershell
    RequiredModules = @('Pester')
```

...then versions 3 or 5 will acceptably load on import and errors happen.

If I use...

```powershell
    RequiredModules = @(
        {
            ModuleName = 'Pester'
            ModuleVersion = '4.0'
        }
    )
```

...then version 3 is out but version 5 is in. Once again: errors happen.

I can evict version 5 with the property `MaximumVersion`...

```powershell
    RequiredModules = @(
        {
            ModuleName = 'Pester'
            MaximumVersion = '4.999'
        }
    )
```

...but then 3 is back in and to boot I think it's a bit gross to read `4.999` there.

Frustratingly, `MinimumVersion` is not an allowable property. Attempting to add it throws this error on import.

> Cannot convert value "System.Collections.Hashtable" to type "[Microsoft.PowerShell.Commands.ModuleSpecification](https://docs.microsoft.com/en-us/dotnet/api/microsoft.powershell.commands.modulespecification)". 
> Error: "The hashtable describing a module contains one or more members that are not valid. 
> The valid members are (ModuleName, ModuleVersion, RequiredVersion, GUID). **Remove the members that are not valid ('MinimumVersion'), then try again.**"

I've also tried using non-standard version numbers like "`4.*`" and "`4.x`" but the ModuleSpecification appears to require `major.minor` or else you get

> InvalidArgument: Cannot convert value "4.x" to type "System.Version". Error: "Input string was not in a correct format.

n.b. You can test allowable version strings using [`[version]'4.x'`](https://docs.microsoft.com/en-us/dotnet/api/system.version)

::: tio K8gvTy0qzkjNydFNzi9K/f8/ugzIz8zPi1U30atQ//8fAA
[version]'4.x'
```
Cannot convert value "4.x" to type "System.Version". 
Error: "Input string was not in a correct format."
+ [version]'4.x'
```
:::

So... how do I pin a range of allowable versions with both a minimum and maximum?