diff --git a/Tests/Unit/Domain/Extractor/Converter/NumberConverterTest.php b/Tests/Unit/Domain/Extractor/Converter/NumberConverterTest.php
index b321cfb..e72a33c 100644
--- a/Tests/Unit/Domain/Extractor/Converter/NumberConverterTest.php
+++ b/Tests/Unit/Domain/Extractor/Converter/NumberConverterTest.php
@@ -30,6 +30,10 @@ public function rationalDataProvider()
                 'rational' => '-24/10',
                 'expected' => -2.4,
             ],
+            'zero' => [
+                'rational' => '0/0',
+                'expected' => 0.0,
+            ],
             'nonRational' => [
                 'rational' => 'twenty-four',
                 'expected' => 0.0,
diff --git a/composer.json b/composer.json
index 21f342d..28166b2 100644
--- a/composer.json
+++ b/composer.json
@@ -4,6 +4,7 @@
   "type": "neos-package",
   "license": "MIT",
   "require": {
+    "ext-exif": "*",
     "neos/flow": "^4.0",
     "neos/media": "^3.0",
     "neos/metadata": "^2.0",