# Release History In this section you will find the release notes for each version we release under this major version. If you are looking for the release notes of previous major versions use the version switcher at the top left of this documentation book. Here is a breakdown of our major version releases. ## Version 5.0 Version 5 is a major architectural shift for ContentBox as we go Multi-Site and Hybrid headless API, with over 145 different improvements and new features. ## Version 4.0 Version 4 focused on upgrading its internal core to ColdBox 5 and providing more modular development around its core. We introduced the `contentbox-custom` module so you can have your assets externalized from the CMS core. We also added tons of security features such as two factor authentication. ## Version 3.0 Version 3 also focused on a major ColdBox upgrade and a completely new admin interface. ## Version 2.0 In this version we introduced the content hierarchy and pages. It was a major leap to a full fledged CMS. ## Version 1.0 Our initial CMS release --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://contentbox.ortusbooks.com/v5.x/intro/release-history.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.