diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 18f667e..75909b1 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,19 +1,19 @@
 lint-composer-validate:
   image:
-    name: php:8.3
+    name: 'php:8.3'
   interruptible: true
   parallel:
     matrix:
       - WORKING_DIR:
-          - modules/core
-          - modules/storage
-          - website
+          - 'modules/core'
+          - 'modules/storage'
+          - 'website'
   rules:
     - changes:
         paths:
-          - "$WORKING_DIR/composer.*"
+          - '$WORKING_DIR/composer.*'
   script:
-    - curl -sS https://getcomposer.org/installer | php
+    - 'curl -sS https://getcomposer.org/installer | php'
     - >
       php composer.phar validate
       --working-dir="$WORKING_DIR"
@@ -22,19 +22,19 @@ lint-composer-validate:
 
 lint-editorconfig:
   image:
-    name: mstruebing/editorconfig-checker:2.7.2
+    name: 'mstruebing/editorconfig-checker:2.7.2'
   interruptible: true
   script:
-    - ec -version
-    - ec -verbose
+    - 'ec -version'
+    - 'ec -verbose'
 
 lint-php-coding-style:
   image:
-    name: ghcr.io/php-cs-fixer/php-cs-fixer:3.49-php8.3
+    name: 'ghcr.io/php-cs-fixer/php-cs-fixer:3.49-php8.3'
     entrypoint:
-      - ""
+      - ''
   interruptible: true
   script:
-    - ls -lah
-    - which php-cs-fixer
-    - php-cs-fixer check -vvv --format gitlab
+    - 'ls -lah'
+    - 'which php-cs-fixer'
+    - 'php-cs-fixer check -vvv --format gitlab'
diff --git a/website/config/packages/asset_mapper.yaml b/website/config/packages/asset_mapper.yaml
index d1ac653..c60b804 100644
--- a/website/config/packages/asset_mapper.yaml
+++ b/website/config/packages/asset_mapper.yaml
@@ -2,4 +2,4 @@ framework:
     asset_mapper:
         # The paths to make available to the asset mapper.
         paths:
-            - assets/
+            - 'assets/'
diff --git a/website/config/packages/framework.yaml b/website/config/packages/framework.yaml
index 877eb25..b149845 100644
--- a/website/config/packages/framework.yaml
+++ b/website/config/packages/framework.yaml
@@ -13,4 +13,4 @@ when@test:
     framework:
         test: true
         session:
-            storage_factory_id: session.storage.factory.mock_file
+            storage_factory_id: 'session.storage.factory.mock_file'
diff --git a/website/config/routes.yaml b/website/config/routes.yaml
index 41ef814..36771b9 100644
--- a/website/config/routes.yaml
+++ b/website/config/routes.yaml
@@ -1,5 +1,5 @@
 controllers:
     resource:
-        path: ../src/Controller/
-        namespace: App\Controller
-    type: attribute
+        path: '../src/Controller/'
+        namespace: 'App\Controller'
+    type: 'attribute'