diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index bc45bdf..dd8bc67 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -34,7 +34,7 @@ jobs:
       JBZOO_COMPOSER_UPDATE_FLAGS: ${{ matrix.composer_flags }}
     strategy:
       matrix:
-        php-version: [ 8.1, 8.2 ]
+        php-version: [ 8.1, 8.2, 8.3 ]
         coverage: [ xdebug, none ]
         composer_flags: [ "--prefer-lowest", "" ]
     steps:
@@ -77,7 +77,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-version: [ 8.1, 8.2 ]
+        php-version: [ 8.1, 8.2, 8.3 ]
     steps:
       - name: Checkout code
         uses: actions/checkout@v3
@@ -111,7 +111,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-version: [ 8.1, 8.2 ]
+        php-version: [ 8.1, 8.2, 8.3 ]
     steps:
       - name: Checkout code
         uses: actions/checkout@v3
diff --git a/composer.json b/composer.json
index 1e7ca06..a032452 100644
--- a/composer.json
+++ b/composer.json
@@ -32,20 +32,20 @@
     },
 
     "require-dev"       : {
-        "jbzoo/toolbox-dev"         : "^7.0",
+        "jbzoo/toolbox-dev"         : "^7.1",
         "jbzoo/utils"               : "^7.1.1",
-        "symfony/yaml"              : ">=4.4",
+        "symfony/yaml"              : ">=6.4",
 
-        "symfony/polyfill-ctype"    : ">=1.27.0",
-        "symfony/polyfill-mbstring" : ">=1.27.0",
-        "symfony/polyfill-php73"    : ">=1.27.0",
-        "symfony/polyfill-php80"    : ">=1.27.0",
-        "symfony/polyfill-php81"    : ">=1.27.0"
+        "symfony/polyfill-ctype"    : ">=1.28.0",
+        "symfony/polyfill-mbstring" : ">=1.28.0",
+        "symfony/polyfill-php73"    : ">=1.28.0",
+        "symfony/polyfill-php80"    : ">=1.28.0",
+        "symfony/polyfill-php81"    : ">=1.28.0"
     },
 
     "suggest"           : {
-        "symfony/yaml" : ">=4.4",
-        "jbzoo/utils"  : ">=7.0"
+        "symfony/yaml" : ">=6.4",
+        "jbzoo/utils"  : ">=7.1"
     },
 
     "autoload"          : {