diff --git a/composer.json b/composer.json
index 6b86abd0..7da79c30 100644
--- a/composer.json
+++ b/composer.json
@@ -4,7 +4,7 @@
     "description": "The TypoScript Reference (TSref) is a true reference describing the core Content Objects and functions available for Template building using the TypoScript template engine.",
     "license": "OPL-1.0",
     "require": {
-        "typo3/cms-core": "dev-main"
+        "typo3/cms-core": "dev-main as 13.4"
     },
     "minimum-stability": "dev",
     "prefer-stable": true,
@@ -29,39 +29,39 @@
         "friendsofphp/php-cs-fixer": "^3.46",
         "symfony/yaml": "^7.0",
         "t3docs/codesnippet": "dev-main",
-        "typo3/cms-adminpanel": "dev-main",
-        "typo3/cms-backend": "dev-main",
-        "typo3/cms-belog": "dev-main",
-        "typo3/cms-beuser": "dev-main",
-        "typo3/cms-dashboard": "dev-main",
-        "typo3/cms-extbase": "dev-main",
-        "typo3/cms-extensionmanager": "dev-main",
-        "typo3/cms-felogin": "dev-main",
-        "typo3/cms-filelist": "dev-main",
-        "typo3/cms-filemetadata": "dev-main",
-        "typo3/cms-fluid": "dev-main",
-        "typo3/cms-fluid-styled-content": "dev-main",
-        "typo3/cms-form": "dev-main",
-        "typo3/cms-frontend": "dev-main",
-        "typo3/cms-impexp": "dev-main",
-        "typo3/cms-indexed-search": "dev-main",
-        "typo3/cms-info": "dev-main",
-        "typo3/cms-install": "dev-main",
-        "typo3/cms-linkvalidator": "dev-main",
-        "typo3/cms-lowlevel": "dev-main",
-        "typo3/cms-opendocs": "dev-main",
-        "typo3/cms-recycler": "dev-main",
-        "typo3/cms-redirects": "dev-main",
-        "typo3/cms-reports": "dev-main",
-        "typo3/cms-rte-ckeditor": "dev-main",
-        "typo3/cms-scheduler": "dev-main",
-        "typo3/cms-seo": "dev-main",
-        "typo3/cms-setup": "dev-main",
-        "typo3/cms-sys-note": "dev-main",
-        "typo3/cms-t3editor": "dev-main",
-        "typo3/cms-tstemplate": "dev-main",
-        "typo3/cms-viewpage": "dev-main",
-        "typo3/cms-workspaces": "dev-main",
+        "typo3/cms-adminpanel": "dev-main as 13.4",
+        "typo3/cms-backend": "dev-main as 13.4",
+        "typo3/cms-belog": "dev-main as 13.4",
+        "typo3/cms-beuser": "dev-main as 13.4",
+        "typo3/cms-dashboard": "dev-main as 13.4",
+        "typo3/cms-extbase": "dev-main as 13.4",
+        "typo3/cms-extensionmanager": "dev-main as 13.4",
+        "typo3/cms-felogin": "dev-main as 13.4",
+        "typo3/cms-filelist": "dev-main as 13.4",
+        "typo3/cms-filemetadata": "dev-main as 13.4",
+        "typo3/cms-fluid": "dev-main as 13.4",
+        "typo3/cms-fluid-styled-content": "dev-main as 13.4",
+        "typo3/cms-form": "dev-main as 13.4",
+        "typo3/cms-frontend": "dev-main as 13.4",
+        "typo3/cms-impexp": "dev-main as 13.4",
+        "typo3/cms-indexed-search": "dev-main as 13.4",
+        "typo3/cms-info": "dev-main as 13.4",
+        "typo3/cms-install": "dev-main as 13.4",
+        "typo3/cms-linkvalidator": "dev-main as 13.4",
+        "typo3/cms-lowlevel": "dev-main as 13.4",
+        "typo3/cms-opendocs": "dev-main as 13.4",
+        "typo3/cms-recycler": "dev-main as 13.4",
+        "typo3/cms-redirects": "dev-main as 13.4",
+        "typo3/cms-reports": "dev-main as 13.4",
+        "typo3/cms-rte-ckeditor": "dev-main as 13.4",
+        "typo3/cms-scheduler": "dev-main as 13.4",
+        "typo3/cms-seo": "dev-main as 13.4",
+        "typo3/cms-setup": "dev-main as 13.4",
+        "typo3/cms-sys-note": "dev-main as 13.4",
+        "typo3/cms-t3editor": "dev-main as 13.4",
+        "typo3/cms-tstemplate": "dev-main as 13.4",
+        "typo3/cms-viewpage": "dev-main as 13.4",
+        "typo3/cms-workspaces": "dev-main as 13.4",
         "t3docs/examples": "dev-main",
         "t3docs/site-package": "dev-main"
     },