diff --git a/src/Review/Models/ProductReview.php b/src/Review/Models/ProductReview.php
index 978c17e..1b94424 100644
--- a/src/Review/Models/ProductReview.php
+++ b/src/Review/Models/ProductReview.php
@@ -5,8 +5,11 @@ namespace Modules\Core\Review\Models;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Lunar\Models\Product;
+use Spatie\Image\Enums\BorderType;
+use Spatie\Image\Enums\Fit;
 use Spatie\MediaLibrary\HasMedia;
 use Spatie\MediaLibrary\InteractsWithMedia;
+use Spatie\MediaLibrary\MediaCollections\Models\Media;
 
 class ProductReview extends Model implements HasMedia
 {
@@ -30,4 +33,23 @@ class ProductReview extends Model implements HasMedia
     {
         $this->addMediaCollection(self::IMAGES_COLLECTION);
     }
+
+    /**
+     * Unlike Product/ProductVariant, this model sits outside Lunar's own
+     * MediaDefinitionsInterface (Lunar\Base\StandardMediaDefinitions), which is
+     * what registers the 'small' conversion those models get automatically. Without
+     * this, Modules\Core\Search\ProductIndexer::mapMedia() — shared across product,
+     * variant, and review media — throws Spatie\MediaLibrary\MediaCollections\
+     * Exceptions\InvalidConversion the first time a review has an image, since
+     * $media->getUrl('small') has no matching conversion to resolve.
+     */
+    public function registerMediaConversions(?Media $media = null): void
+    {
+        $this->addMediaConversion('small')
+            ->fit(Fit::Fill, 300, 300)
+            ->border(0, BorderType::Overlay, color: '#FFF')
+            ->background('#FFF')
+            ->sharpen(10)
+            ->keepOriginalImageFormat();
+    }
 }