diff --git a/.github/workflows/codeception.yaml b/.github/workflows/codeception.yaml
index f33eff0..7716e8b 100644
--- a/.github/workflows/codeception.yaml
+++ b/.github/workflows/codeception.yaml
@@ -74,6 +74,7 @@ jobs:
                 run: |
                     if [ ! -z "$PIMCORE_VERSION" ]; then
                           composer require --no-update pimcore/pimcore:"${PIMCORE_VERSION}"
+                          composer require --no-update pimcore/admin-ui-classic-bundle:1.x-dev
                     fi
             -   name: "Install dependencies with Composer"
                 uses: "ramsey/composer-install@v2"
diff --git a/.github/workflows/static-analysis.yaml b/.github/workflows/static-analysis.yaml
index 81b2459..f4095d5 100644
--- a/.github/workflows/static-analysis.yaml
+++ b/.github/workflows/static-analysis.yaml
@@ -49,6 +49,7 @@ jobs:
                 run: |
                     if [ ! -z "$PIMCORE_VERSION" ]; then
                           composer require --no-update pimcore/pimcore:${PIMCORE_VERSION}
+                          composer require --no-update pimcore/admin-ui-classic-bundle:1.x-dev
                     fi                  
 
             -   name: "Install dependencies with Composer"
diff --git a/composer.json b/composer.json
index 90996ed..715da0e 100644
--- a/composer.json
+++ b/composer.json
@@ -10,6 +10,8 @@
             "*": "dist"
         }
     },
+    "prefer-stable": true,
+    "minimum-stability": "dev",
     "require": {
         "php": "~8.1.0 || ~8.2.0 || ~8.3.0",
         "pimcore/pimcore": "^11.0",
@@ -32,6 +34,9 @@
         "codeception/module-asserts": "^2",
         "codeception/module-symfony": "^3.1.1"
     },
+    "conflict": {
+       "symfony/string": "<6.0"
+    },
     "autoload": {
         "psr-4": {
             "Pimcore\\Bundle\\PersonalizationBundle\\": "src/",