diff --git a/CHANGELOG.md b/CHANGELOG.md
index b36c5b7..50acad5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # ImageOptimize Changelog
 
+## 1.6.48 - 2022.07.17
+### Changed
+* Add `allow-plugins` to `composer.json` to allow CI tests to work
+
+### Fixed
+* Fixed an issue where transforms don't get deleted on remote volumes if the format was set to `auto` ([#341](https://github.com/nystudio107/craft-imageoptimize/issues/341))
+* Normalize for lowercase file extensions and normalize `jpeg` -> `jpg` everywhere
+
 ## 1.6.47 - 2022.07.08
 ### Fixed
 * If there's no transform requested, return `null` so other plugins have a crack at it ([#349](https://github.com/nystudio107/craft-imageoptimize/issues/349))
diff --git a/composer.json b/composer.json
index 91eabc6..6bc8773 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
   "name": "nystudio107/craft-imageoptimize",
   "description": "Automatically create & optimize responsive image transforms, using either native Craft transforms or a service like imgix, with zero template changes.",
   "type": "craft-plugin",
-  "version": "1.6.47",
+  "version": "1.6.48",
   "keywords": [
     "craft",
     "cms",
@@ -36,6 +36,14 @@
     "ksubileau/color-thief-php": "^1.3",
     "mikehaertl/php-shellcommand": "~1.2"
   },
+  "config": {
+    "allow-plugins": {
+      "craftcms/plugin-installer": true,
+      "yiisoft/yii2-composer": true
+    },
+    "optimize-autoloader": true,
+    "sort-packages": true
+  },
   "autoload": {
     "psr-4": {
       "nystudio107\\imageoptimize\\": "src/"
diff --git a/src/services/Optimize.php b/src/services/Optimize.php
index 281347b..eae75c5 100644
--- a/src/services/Optimize.php
+++ b/src/services/Optimize.php
@@ -173,8 +173,14 @@ public function handleGetAssetUrlEvent(GetAssetUrlEvent $event)
                 $assetTransforms = Craft::$app->getAssetTransforms();
                 $transform = $assetTransforms->getTransformByHandle($transform);
             }
-            // If the final format is an SVG, don't attempt to transform it
             $finalFormat = empty($transform['format']) ? $asset->getExtension() : $transform['format'];
+            // Normalize the extension to lowercase, for some transform methods that require this
+            $finalFormat = strtolower($finalFormat);
+            // Special-case for 'jpeg'
+            if ($finalFormat === 'jpeg') {
+                $finalFormat = 'jpg';
+            }
+            // If the final format is an SVG, don't attempt to transform it
             if ($finalFormat === 'svg') {
                 return null;
             }
@@ -215,8 +221,14 @@ public function handleGetAssetThumbUrlEvent(GetAssetThumbUrlEvent $event)
                 ]);
                 /** @var ImageTransform $transformMethod */
                 $transformMethod = ImageOptimize::$plugin->transformMethod;
-                // If the final format is an SVG, don't attempt to transform it
                 $finalFormat = empty($transform['format']) ? $asset->getExtension() : $transform['format'];
+                // Normalize the extension to lowercase, for some transform methods that require this
+                $finalFormat = strtolower($finalFormat);
+                // Special-case for 'jpeg'
+                if ($finalFormat === 'jpeg') {
+                    $finalFormat = 'jpg';
+                }
+                // If the final format is an SVG, don't attempt to transform it
                 if ($finalFormat === 'svg') {
                     return null;
                 }
@@ -801,6 +813,13 @@ protected function cleanupImageVariants(Asset $asset, AssetTransformIndex $trans
         // Get the active image variant creators
         $activeImageVariantCreators = $settings->activeImageVariantCreators;
         $fileFormat = $transformIndex->detectedFormat ?? $transformIndex->format;
+        $fileFormat = empty($fileFormat) ? $asset->getExtension() : $fileFormat;
+        // Normalize the extension to lowercase, for some transform methods that require this
+        $fileFormat = strtolower($fileFormat);
+        // Special-case for 'jpeg'
+        if ($fileFormat === 'jpeg') {
+            $fileFormat = 'jpg';
+        }
         if (!empty($activeImageVariantCreators[$fileFormat])) {
             // Iterate through all of the image variant creators for this format
             $imageVariantCreators = $settings->imageVariantCreators;