diff --git a/README.md b/README.md
index 089f863..6cc9aad 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ Fast Backend User Switch (TYPO3 Extension `beuser_fastswitch`)
 
 * Switch to another backend user
 * Edit another backend user (in a new tab)
-* Show user info of a specific backend user (in a popup)
+* Show user info of a specific backend user (in a modal)
 
 ### It provides an AJAX based search
 
@@ -37,7 +37,7 @@ searching for it.
 
 ## Requirements
 
-1. TYPO3 core version support: 10 LTS, 11 LTS
+1. TYPO3 core version support: 11 LTS, 12-dev
 2. PHP version: >= 7.2
 
 ## Installation
@@ -48,6 +48,8 @@ The recommended way to install the extension is by using
 [Composer](https://getcomposer.org/). In your Composer based TYPO3
 project root, just do `composer require josefglatz/beuser-fastswitch`.
 
+> **TYPO3 core version =< 10 LTS support by using version 3.x:** `composer req josefglatz/beuser-fastswitch:^3`
+
 ### Installation as extension from TYPO3 Extension Repository (TER)
 
 Download and install the extension with the TYPO3 CMS extension manager
diff --git a/ext_emconf.php b/ext_emconf.php
index da101aa..f116c61 100644
--- a/ext_emconf.php
+++ b/ext_emconf.php
@@ -8,7 +8,7 @@
     'author_company' => 'https://www.josefglatz.at',
     'state' => 'stable',
     'clearCacheOnLoad' => true,
-    'version' => '3.2.1',
+    'version' => '4.0.0',
     'constraints' => [
         'depends' => [
             'typo3' => '11.5.0-12.9.99',