diff --git a/src/DependencyInjection/Configuration.php b/src/DependencyInjection/Configuration.php
index ea290c3..5a26005 100644
--- a/src/DependencyInjection/Configuration.php
+++ b/src/DependencyInjection/Configuration.php
@@ -596,8 +596,8 @@ private function getIconsNode(string $info): ArrayNodeDefinition
                         ->example([['16', '32']])
                         ->integerPrototype()->end()
                     ->end()
-                    ->scalarNode('format')
-                        ->info('The icon format output.')
+                    ->scalarNode('type')
+                        ->info('The icon mime type.')
                         ->example(['image/webp', 'image/png'])
                     ->end()
                     ->scalarNode('purpose')
diff --git a/src/Dto/Icon.php b/src/Dto/Icon.php
index 1d3a359..8b013b9 100644
--- a/src/Dto/Icon.php
+++ b/src/Dto/Icon.php
@@ -16,7 +16,7 @@ final class Icon
     #[SerializedName('sizes')]
     public array $sizeList;
 
-    public null|string $format = null;
+    public null|string $type = null;
 
     public null|string $purpose = null;
 
diff --git a/src/Normalizer/IconNormalizer.php b/src/Normalizer/IconNormalizer.php
index 2d42f28..0c18982 100644
--- a/src/Normalizer/IconNormalizer.php
+++ b/src/Normalizer/IconNormalizer.php
@@ -28,16 +28,16 @@ public function __construct(
     public function normalize(mixed $object, string $format = null, array $context = []): array
     {
         assert($object instanceof Icon);
-        $imageFormat = null;
+        $imageType = $object->type;
         if (! str_starts_with($object->src->src, '/')) {
             $asset = $this->assetMapper->getAsset($object->src->src);
-            $imageFormat = $this->getFormat($object, $asset);
+            $imageType = $this->getType($asset);
         }
 
         $result = [
             'src' => $this->normalizer->normalize($object->src, $format, $context),
             'sizes' => $object->getSizeList(),
-            'type' => $imageFormat,
+            'type' => $imageType,
             'purpose' => $object->purpose,
         ];
 
@@ -64,12 +64,8 @@ public function getSupportedTypes(?string $format): array
         ];
     }
 
-    private function getFormat(Icon $object, ?MappedAsset $asset): ?string
+    private function getType(?MappedAsset $asset): ?string
     {
-        if ($object->format !== null) {
-            return $object->format;
-        }
-
         if ($asset === null || ! class_exists(MimeTypes::class)) {
             return null;
         }
diff --git a/src/Twig/PwaRuntime.php b/src/Twig/PwaRuntime.php
index fe21cf8..2b659a2 100644
--- a/src/Twig/PwaRuntime.php
+++ b/src/Twig/PwaRuntime.php
@@ -116,15 +116,15 @@ private function injectIcons(string $output, bool $injectIcons): string
             return $output;
         }
         foreach ($this->manifest->icons as $icon) {
-            ['url' => $url, 'format' => $format] = $this->getIconInfo($icon);
+            ['url' => $url, 'type' => $type] = $this->getIconInfo($icon);
             $attributes = sprintf(
                 'rel="%s" sizes="%s" href="%s"',
                 str_contains($icon->purpose ?? '', 'maskable') ? 'mask-icon' : 'icon',
                 $icon->getSizeList(),
                 $url
             );
-            if ($format !== null) {
-                $attributes .= sprintf(' type="%s"', $format);
+            if ($type !== null) {
+                $attributes .= sprintf(' type="%s"', $type);
             }
 
             $output .= sprintf('%s<link %s>', PHP_EOL, $attributes);
@@ -134,16 +134,16 @@ private function injectIcons(string $output, bool $injectIcons): string
     }
 
     /**
-     * @return array{url: string, format: string|null}
+     * @return array{url: string, type: string|null}
      */
     private function getIconInfo(Icon $icon): array
     {
         $url = null;
-        $format = $icon->format;
-        if (! str_starts_with($icon->src->src, '/')) {
+        $type = $icon->type;
+        if ($type === null && ! str_starts_with($icon->src->src, '/')) {
             $asset = $this->assetMapper->getAsset($icon->src->src);
             $url = $asset?->publicPath;
-            $format = $this->getFormat($icon, $asset);
+            $type = $this->getFormat($asset);
         }
         if ($url === null) {
             $url = $icon->src->src;
@@ -151,16 +151,12 @@ private function getIconInfo(Icon $icon): array
 
         return [
             'url' => $url,
-            'format' => $format,
+            'type' => $type,
         ];
     }
 
-    private function getFormat(Icon $object, ?MappedAsset $asset): ?string
+    private function getFormat(?MappedAsset $asset): ?string
     {
-        if ($object->format !== null) {
-            return $object->format;
-        }
-
         if ($asset === null || ! class_exists(MimeTypes::class)) {
             return null;
         }
diff --git a/tests/config.php b/tests/config.php
index 3d55e1d..cbfdf5f 100644
--- a/tests/config.php
+++ b/tests/config.php
@@ -78,12 +78,12 @@
                 [
                     'src' => 'pwa/1920x1920.svg',
                     'sizes' => [48, 72, 96, 128, 256],
-                    'format' => 'webp',
+                    'type' => 'webp',
                 ],
                 [
                     'src' => 'pwa/1920x1920.svg',
                     'sizes' => [48, 72, 96, 128, 256],
-                    'format' => 'png',
+                    'type' => 'png',
                     'purpose' => 'maskable',
                 ],
                 [
@@ -211,7 +211,7 @@
                         [
                             'src' => 'pwa/1920x1920.svg',
                             'sizes' => [16, 48],
-                            'format' => 'webp',
+                            'type' => 'webp',
                         ],
                     ],
                     'auth' => false,