diff --git a/.env b/.env
index e3c1acce..3f85dfc7 100644
--- a/.env
+++ b/.env
@@ -5,7 +5,7 @@ WEBROOT=.Build/public
 TYPO3_CACHE_DIR=var
 
 SQLDUMPSDIR=.project/data/
-SQLDUMPFILE=db.sql.gz
+SQLDUMPFILE=db_typo3_12.sql.gz
 SQLPORT=53843
 
 # Service names from docker-compose.yml to include in URL generation make target. Delimited by \|
diff --git a/.project/data/db_typo3_12.sql.gz b/.project/data/db_typo3_12.sql.gz
new file mode 100644
index 00000000..adff86c6
Binary files /dev/null and b/.project/data/db_typo3_12.sql.gz differ
diff --git a/composer.json b/composer.json
index ae840b68..ff48998f 100644
--- a/composer.json
+++ b/composer.json
@@ -40,26 +40,26 @@
 		"typo3/cms-dashboard": "*"
 	},
 	"require-dev": {
-		"typo3/cms-core": "^13.3",
-		"typo3/cms-extbase": "^13.3",
-		"typo3/cms-extensionmanager": "^13.3",
-		"typo3/cms-felogin": "^13.3",
-		"typo3/cms-filelist": "^13.3",
-		"typo3/cms-fluid-styled-content": "^13.3",
-		"typo3/cms-frontend": "^13.3",
-		"typo3/cms-info": "^13.3",
-		"typo3/cms-install": "^13.3",
-		"typo3/cms-recordlist": "^13.3",
-		"typo3/cms-rte-ckeditor": "^13.3",
-		"typo3/cms-scheduler": "^13.3",
-		"typo3/cms-setup": "^13.3",
-		"typo3/cms-t3editor": "^13.3",
-		"typo3/cms-tstemplate": "^13.3",
-		"typo3/cms-lowlevel": "^13.3",
-		"typo3/cms-adminpanel": "^13.3",
-		"typo3/cms-belog": "^13.3",
-		"typo3/cms-beuser": "^13.3",
-		"typo3/cms-dashboard": "^13.3",
+		"typo3/cms-core": "^12.4",
+		"typo3/cms-extbase": "^12.4",
+		"typo3/cms-extensionmanager": "^12.4",
+		"typo3/cms-felogin": "^12.4",
+		"typo3/cms-filelist": "^12.4",
+		"typo3/cms-fluid-styled-content": "^12.4",
+		"typo3/cms-frontend": "^12.4",
+		"typo3/cms-info": "^12.4",
+		"typo3/cms-install": "^12.4",
+		"typo3/cms-recordlist": "^12.4",
+		"typo3/cms-rte-ckeditor": "^12.4",
+		"typo3/cms-scheduler": "^12.4",
+		"typo3/cms-setup": "^12.4",
+		"typo3/cms-t3editor": "^12.4",
+		"typo3/cms-tstemplate": "^12.4",
+		"typo3/cms-lowlevel": "^12.4",
+		"typo3/cms-adminpanel": "^12.4",
+		"typo3/cms-belog": "^12.4",
+		"typo3/cms-beuser": "^12.4",
+		"typo3/cms-dashboard": "^12.4",
 		"typo3/testing-framework": "^8.2",
 		"symfony/config": ">6.2.0",
 		"mikey179/vfsstream": "^1.6",