diff --git a/Documentation/guides.xml b/Documentation/guides.xml
index 4ebe0cd..e10d384 100644
--- a/Documentation/guides.xml
+++ b/Documentation/guides.xml
@@ -16,8 +16,8 @@
                interlink-shortcode="evoweb/sf-books"
     />
     <project title="ew_collapsible_container"
-             release="1.3.1"
-             version="1.3.1"
+             release="1.4.0"
+             version="1.4.0"
              copyright="since 2024 by evoWeb"
     />
     <inventory id="t3tsref" url="https://docs.typo3.org/m/typo3/reference-typoscript/main/en-us/"/>
diff --git a/composer.json b/composer.json
index 1d2f5f7..b3242a1 100644
--- a/composer.json
+++ b/composer.json
@@ -6,6 +6,9 @@
 	"license": [
 		"GPL-2.0-or-later"
 	],
+	"require": {
+		"typo3/cms-backend": "^11.5 || ^12.4 || ^13.0"
+	},
 	"autoload": {
 		"psr-4": {
 			"Evoweb\\EwCollapsibleContainer\\": "Classes/"
diff --git a/ext_emconf.php b/ext_emconf.php
index 6b4fdaa..8899954 100644
--- a/ext_emconf.php
+++ b/ext_emconf.php
@@ -8,10 +8,10 @@
     'author_email' => 'ew-collapsible-container@evoweb.de',
     'author_company' => 'evoWeb',
     'state' => 'stable',
-    'version' => '1.3.1',
+    'version' => '1.4.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '11.5.0-12.4.99',
+            'typo3' => '11.5.0-13.4.99',
         ],
     ],
 ];