diff --git a/.github/workflows/static-analysis.yml b/.github/workflows/static-analysis.yml
index fc0eb7c2..5011ee93 100644
--- a/.github/workflows/static-analysis.yml
+++ b/.github/workflows/static-analysis.yml
@@ -28,10 +28,10 @@ jobs:
                     - { php-version: "8.3", dependencies: "highest", experimental: false }
         steps:
             - name: "Checkout code"
-              uses: "actions/checkout@v2"
+              uses: actions/checkout@v4
 
             - name: "Install PHP"
-              uses: "shivammathur/setup-php@v2"
+              uses: shivammathur/setup-php@v2
               with:
                   coverage: "none"
                   php-version: "${{ matrix.php-version }}"
@@ -47,7 +47,7 @@ jobs:
                         composer require --no-update pimcore/pimcore:"${PIMCORE_VERSION}"
                   fi
             - name: "Install dependencies with Composer"
-              uses: "ramsey/composer-install@v2"
+              uses: ramsey/composer-install@v3
               with:
                   dependency-versions: "${{ matrix.dependencies }}"
 
@@ -60,7 +60,7 @@ jobs:
 
             - name: "Upload baseline file"
               if: ${{ failure() }}
-              uses: actions/upload-artifact@v2
+              uses: actions/upload-artifact@v4
               with:
                   name: phpstan-baseline.neon
                   path: phpstan-baseline.neon
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 00000000..0a73b601
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,2 @@
+#### v1.2.1
+- Removed the package "rybakit/twig-deferred-extension". If you extend the twig layout from the E-Commerce Framework, please check if custom CSS/JS code added by `pimcore_head_script` and `pimcore_head_link` is still working. 
diff --git a/composer.json b/composer.json
index c445ff51..9965a182 100644
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,6 @@
     "pimcore/google-marketing-bundle": "^1.0",
     "knplabs/knp-paginator-bundle": "^6.0.0",
     "symfony/webpack-encore-bundle": "^1.13.2",
-    "rybakit/twig-deferred-extension": "^3.0",
     "symfony/form": "^6.2"
   },
   "require-dev": {
@@ -33,9 +32,6 @@
     "elasticsearch/elasticsearch": "^8.0",
     "pimcore/elasticsearch-client": "^1.0.0"
   },
-  "conflict": {
-    "twig/twig": "^3.9.0"
-  },
   "suggest": {
     "elasticsearch/elasticsearch": "Required for Elastic Search service",
     "webmozarts/console-parallelization": "Required for parallelization of console commands"
diff --git a/src/Resources/config/services.yaml b/src/Resources/config/services.yaml
index a20cefe7..309e2578 100644
--- a/src/Resources/config/services.yaml
+++ b/src/Resources/config/services.yaml
@@ -22,8 +22,3 @@ services:
         resource: '../../Controller'
         public: true
         tags: ['controller.service_arguments']
-
-    # the deferred extension is needed for placeholder helpers to work
-    # as otherwise the placeholder block would be rendered before any
-    # content was added (e.g. headTitle)
-    Twig\DeferredExtension\DeferredExtension: ~
diff --git a/src/Resources/views/admin_order/detail.html.twig b/src/Resources/views/admin_order/detail.html.twig
index b10607ac..2ac499dc 100644
--- a/src/Resources/views/admin_order/detail.html.twig
+++ b/src/Resources/views/admin_order/detail.html.twig
@@ -411,7 +411,7 @@
         </div>
     </div>
 
-    {% do pimcore_head_script().captureStart() %}
+    {% set inlineScript %}
         document.addEventListener("DOMContentLoaded", function(event) {
             // pimcore open object
             document.querySelectorAll('[data-action=open]').forEach(function(el){
@@ -448,5 +448,6 @@
             {% endif %}
 
         });
-    {% do pimcore_head_script().captureEnd() %}
+    {% endset %}
+    {% do pimcore_head_script().appendScript(inlineScript ~ "") %}
 {% endblock %}
diff --git a/src/Resources/views/admin_order/list.html.twig b/src/Resources/views/admin_order/list.html.twig
index a8c01742..8b099de8 100644
--- a/src/Resources/views/admin_order/list.html.twig
+++ b/src/Resources/views/admin_order/list.html.twig
@@ -105,7 +105,7 @@
         {% include "@PimcoreEcommerceFramework/includes/paging.html.twig" with {'paginationVariables': paginator.getPaginationData() } %}
     {% endif %}
 
-    {% do pimcore_head_script().captureStart() %}
+    {% set inlineScript %}
             //datepicker
             flatpickr(".date", {allowInput: true});
 
@@ -116,7 +116,9 @@
                 });
             });
 
-    {% do pimcore_head_script().captureEnd() %}
+    {% endset %}
+
+    {% do pimcore_head_script().appendScript(inlineScript ~ "") %}
 {% endblock %}
 
 
diff --git a/src/Resources/views/back-office.html.twig b/src/Resources/views/back-office.html.twig
index 13eb3077..a8a46bda 100644
--- a/src/Resources/views/back-office.html.twig
+++ b/src/Resources/views/back-office.html.twig
@@ -24,7 +24,7 @@
             {% do pimcore_head_script().prependFile(asset('/bundles/pimcoreecommerceframework/vendor/bootstrap4/js/bootstrap-native-v4.min.js')) %}
         {% endapply %}
 
-        {% block head_stylesheets deferred %}
+        {% block head_stylesheets %}
             {{ pimcore_head_link() }}
         {% endblock %}
 
@@ -79,7 +79,7 @@
     </div>
 
     {# output scripts added before #}
-    {% block scripts deferred %}
+    {% block scripts %}
         {{ pimcore_head_script() }}
     {% endblock %}
 
diff --git a/src/Resources/views/voucher/voucher_layout.html.twig b/src/Resources/views/voucher/voucher_layout.html.twig
index 86eed18c..e3144d6b 100644
--- a/src/Resources/views/voucher/voucher_layout.html.twig
+++ b/src/Resources/views/voucher/voucher_layout.html.twig
@@ -19,13 +19,13 @@
         {% do pimcore_head_script().appendFile(asset('/bundles/pimcoreecommerceframework/js/voucherservice/voucherSeriesTabScript.js')) %}
     {% endapply %}
 
-    {% block head_stylesheets deferred %}
+    {% block head_stylesheets %}
         {{ pimcore_head_link() }}
     {% endblock %}
 </head>
 <body>
     {# output scripts added before #}
-    {% block scripts deferred %}
+    {% block scripts %}
         {{ pimcore_head_script() }}
     {% endblock %}
     {% set colors = {