Can't install Contao 4.5.6 standard-edition!

I am getting an error message "Could not find package contao/standard-eidtion with version 4.5.6", thus I can not install contao 4.5.6 locally. Any suggestions are welcome.

What I have done is

Code:

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composer create-project contao/standard-edition:4.5.6 contao456

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php version: 7.2.3
composer version: 1.6.3

There is no Contao standard edition anymore (see https://contao.org/en/news/downloadi...o-in-2017.html). The last release of the standard edition was 4.4.7. Use the Contao managed edition instead!

That's it then! Thanks for the information.