diff --git a/CHANGELOG.md b/CHANGELOG.md
index c977078c3..f924acf57 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,14 +2,18 @@
 
 All notable changes to `laravel-medialibrary` will be documented in this file
 
-## 7.19.2 - 2020-03-09
+## 7.19.3 - 2020-03-09
 
 - fix responsive images extension (#1752)
 - use native file copy (#1758)
 
+## 7.19.2 - 2020-03-04
+
+- revert changes in 7.19.1
+
 ## 7.19.1 - 2020-03-04
 
-- Update S3 url generator to use media disk #1755
+- Update S3 url generator to use media disk (#1755)
 
 ## 7.19.0 - 2020-03-03
 
diff --git a/src/ResponsiveImages/ResponsiveImageGenerator.php b/src/ResponsiveImages/ResponsiveImageGenerator.php
index 0a1e3e725..771b1e71c 100644
--- a/src/ResponsiveImages/ResponsiveImageGenerator.php
+++ b/src/ResponsiveImages/ResponsiveImageGenerator.php
@@ -82,7 +82,7 @@ public function generateResponsiveImage(
         int $targetWidth,
         BaseTemporaryDirectory $temporaryDirectory
     ) {
-        $responsiveImagePath = $this->appendToFileName($media->file_name, "___{$conversionName}_{$targetWidth}");
+        $responsiveImagePath = $this->appendToFileName($media->file_name, "___{$conversionName}_{$targetWidth}", $baseImage);
 
         $tempDestination = $temporaryDirectory->path($responsiveImagePath);
 
@@ -133,11 +133,11 @@ public function generateTinyJpg(Media $media, string $originalImagePath, string
         ResponsiveImage::registerTinySvg($media, $base64Svg, $conversionName);
     }
 
-    protected function appendToFileName(string $filePath, string $suffix): string
+    protected function appendToFileName(string $filePath, string $suffix, string $extensionFilePath = null): string
     {
         $baseName = pathinfo($filePath, PATHINFO_FILENAME);
 
-        $extension = pathinfo($filePath, PATHINFO_EXTENSION);
+        $extension = pathinfo($extensionFilePath ?? $filePath, PATHINFO_EXTENSION);
 
         return $baseName.$suffix.'.'.$extension;
     }
diff --git a/src/UrlGenerator/S3UrlGenerator.php b/src/UrlGenerator/S3UrlGenerator.php
index 46bae7de4..5874c7acb 100644
--- a/src/UrlGenerator/S3UrlGenerator.php
+++ b/src/UrlGenerator/S3UrlGenerator.php
@@ -35,7 +35,7 @@ public function getUrl(): string
 
         $url = $this->versionUrl($url);
 
-        return config('medialibrary.'.$this->media->disk.'.domain').'/'.$url;
+        return config('medialibrary.s3.domain').'/'.$url;
     }
 
     /**
@@ -76,6 +76,6 @@ public function getResponsiveImagesDirectoryUrl(): string
             $url = $root.'/'.$url;
         }
 
-        return config('medialibrary.'.$this->media->disk.'.domain').'/'.$url;
+        return config('medialibrary.s3.domain').'/'.$url;
     }
 }
diff --git a/tests/Feature/ResponsiveImages/ResponsiveImageGeneratorTest.php b/tests/Feature/ResponsiveImages/ResponsiveImageGeneratorTest.php
index 79f977c66..66b4ec245 100644
--- a/tests/Feature/ResponsiveImages/ResponsiveImageGeneratorTest.php
+++ b/tests/Feature/ResponsiveImages/ResponsiveImageGeneratorTest.php
@@ -33,6 +33,18 @@ public function its_conversions_can_have_responsive_images()
         $this->assertFileExists($this->getTempDirectory('media/1/responsive-images/test___thumb_50_41.jpg'));
     }
 
+    /** @test */
+    public function its_conversions_can_have_responsive_images_and_change_format()
+    {
+        $this->testModelWithResponsiveImages
+            ->addMedia($this->getTestPng())
+            ->withResponsiveImages()
+            ->toMediaCollection();
+
+        $this->assertFileExists($this->getTempDirectory('media/1/responsive-images/test___pngtojpg_700_883.jpg'));
+        $this->assertFileExists($this->getTempDirectory('media/1/responsive-images/test___pngtojpg_585_737.jpg'));
+    }
+
     /** @test */
     public function it_triggers_an_event_when_the_responsive_images_are_generated()
     {
diff --git a/tests/Support/TestModels/TestModelWithResponsiveImages.php b/tests/Support/TestModels/TestModelWithResponsiveImages.php
index d92cf1a6f..6491038c3 100644
--- a/tests/Support/TestModels/TestModelWithResponsiveImages.php
+++ b/tests/Support/TestModels/TestModelWithResponsiveImages.php
@@ -2,6 +2,7 @@
 
 namespace Spatie\MediaLibrary\Tests\Support\TestModels;
 
+use Spatie\Image\Manipulations;
 use Spatie\MediaLibrary\Models\Media;
 
 class TestModelWithResponsiveImages extends TestModel
@@ -20,5 +21,12 @@ public function registerMediaConversions(Media $media = null)
 
         $this->addMediaConversion('otherImageConversion')
             ->greyscale();
+
+        $this->addMediaConversion('pngtojpg')
+            ->width(700)
+            ->quality(1)
+            ->background('blue')
+            ->format(Manipulations::FORMAT_JPG)
+            ->withResponsiveImages();
     }
 }