diff --git a/composer.json b/composer.json
index 2d659924d5..631d70b7c1 100644
--- a/composer.json
+++ b/composer.json
@@ -3,7 +3,7 @@
 	"description": "The Kirby 3 core",
 	"license": "proprietary",
 	"type": "kirby-cms",
-	"version": "3.7.5.3",
+	"version": "3.7.5.4",
 	"keywords": [
 		"kirby",
 		"cms",
diff --git a/composer.lock b/composer.lock
index bed6e2ca45..dfba5cc522 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "d5a583f75adc58a2e17ffbb86e9e2e88",
+    "content-hash": "98eb2f5524dc0fbeee9a5b8571160728",
     "packages": [
         {
             "name": "claviska/simpleimage",
@@ -754,5 +754,5 @@
     "platform-overrides": {
         "php": "7.4.0"
     },
-    "plugin-api-version": "2.3.0"
+    "plugin-api-version": "2.6.0"
 }
diff --git a/vendor/composer/autoload_classmap.php b/vendor/composer/autoload_classmap.php
index 4e15933827..a939973d7e 100644
--- a/vendor/composer/autoload_classmap.php
+++ b/vendor/composer/autoload_classmap.php
@@ -120,10 +120,6 @@
     'Kirby\\Cms\\UserRules' => $baseDir . '/src/Cms/UserRules.php',
     'Kirby\\Cms\\Users' => $baseDir . '/src/Cms/Users.php',
     'Kirby\\Cms\\Visitor' => $baseDir . '/src/Cms/Visitor.php',
-    'Kirby\\ComposerInstaller\\CmsInstaller' => $vendorDir . '/getkirby/composer-installer/src/ComposerInstaller/CmsInstaller.php',
-    'Kirby\\ComposerInstaller\\Installer' => $vendorDir . '/getkirby/composer-installer/src/ComposerInstaller/Installer.php',
-    'Kirby\\ComposerInstaller\\Plugin' => $vendorDir . '/getkirby/composer-installer/src/ComposerInstaller/Plugin.php',
-    'Kirby\\ComposerInstaller\\PluginInstaller' => $vendorDir . '/getkirby/composer-installer/src/ComposerInstaller/PluginInstaller.php',
     'Kirby\\Data\\Data' => $baseDir . '/src/Data/Data.php',
     'Kirby\\Data\\Handler' => $baseDir . '/src/Data/Handler.php',
     'Kirby\\Data\\Json' => $baseDir . '/src/Data/Json.php',
@@ -289,6 +285,9 @@
     'Psr\\Log\\LoggerInterface' => $vendorDir . '/psr/log/Psr/Log/LoggerInterface.php',
     'Psr\\Log\\LoggerTrait' => $vendorDir . '/psr/log/Psr/Log/LoggerTrait.php',
     'Psr\\Log\\NullLogger' => $vendorDir . '/psr/log/Psr/Log/NullLogger.php',
+    'Psr\\Log\\Test\\DummyTest' => $vendorDir . '/psr/log/Psr/Log/Test/DummyTest.php',
+    'Psr\\Log\\Test\\LoggerInterfaceTest' => $vendorDir . '/psr/log/Psr/Log/Test/LoggerInterfaceTest.php',
+    'Psr\\Log\\Test\\TestLogger' => $vendorDir . '/psr/log/Psr/Log/Test/TestLogger.php',
     'Spyc' => $baseDir . '/dependencies/spyc/Spyc.php',
     'Symfony\\Polyfill\\Intl\\Idn\\Idn' => $vendorDir . '/symfony/polyfill-intl-idn/Idn.php',
     'Symfony\\Polyfill\\Intl\\Idn\\Info' => $vendorDir . '/symfony/polyfill-intl-idn/Info.php',
diff --git a/vendor/composer/autoload_static.php b/vendor/composer/autoload_static.php
index 2bc6e5652a..fddc071b43 100644
--- a/vendor/composer/autoload_static.php
+++ b/vendor/composer/autoload_static.php
@@ -212,10 +212,6 @@ class ComposerStaticInita8011b477bb239488e5d139cdeb7b31e
         'Kirby\\Cms\\UserRules' => __DIR__ . '/../..' . '/src/Cms/UserRules.php',
         'Kirby\\Cms\\Users' => __DIR__ . '/../..' . '/src/Cms/Users.php',
         'Kirby\\Cms\\Visitor' => __DIR__ . '/../..' . '/src/Cms/Visitor.php',
-        'Kirby\\ComposerInstaller\\CmsInstaller' => __DIR__ . '/..' . '/getkirby/composer-installer/src/ComposerInstaller/CmsInstaller.php',
-        'Kirby\\ComposerInstaller\\Installer' => __DIR__ . '/..' . '/getkirby/composer-installer/src/ComposerInstaller/Installer.php',
-        'Kirby\\ComposerInstaller\\Plugin' => __DIR__ . '/..' . '/getkirby/composer-installer/src/ComposerInstaller/Plugin.php',
-        'Kirby\\ComposerInstaller\\PluginInstaller' => __DIR__ . '/..' . '/getkirby/composer-installer/src/ComposerInstaller/PluginInstaller.php',
         'Kirby\\Data\\Data' => __DIR__ . '/../..' . '/src/Data/Data.php',
         'Kirby\\Data\\Handler' => __DIR__ . '/../..' . '/src/Data/Handler.php',
         'Kirby\\Data\\Json' => __DIR__ . '/../..' . '/src/Data/Json.php',
@@ -381,6 +377,9 @@ class ComposerStaticInita8011b477bb239488e5d139cdeb7b31e
         'Psr\\Log\\LoggerInterface' => __DIR__ . '/..' . '/psr/log/Psr/Log/LoggerInterface.php',
         'Psr\\Log\\LoggerTrait' => __DIR__ . '/..' . '/psr/log/Psr/Log/LoggerTrait.php',
         'Psr\\Log\\NullLogger' => __DIR__ . '/..' . '/psr/log/Psr/Log/NullLogger.php',
+        'Psr\\Log\\Test\\DummyTest' => __DIR__ . '/..' . '/psr/log/Psr/Log/Test/DummyTest.php',
+        'Psr\\Log\\Test\\LoggerInterfaceTest' => __DIR__ . '/..' . '/psr/log/Psr/Log/Test/LoggerInterfaceTest.php',
+        'Psr\\Log\\Test\\TestLogger' => __DIR__ . '/..' . '/psr/log/Psr/Log/Test/TestLogger.php',
         'Spyc' => __DIR__ . '/../..' . '/dependencies/spyc/Spyc.php',
         'Symfony\\Polyfill\\Intl\\Idn\\Idn' => __DIR__ . '/..' . '/symfony/polyfill-intl-idn/Idn.php',
         'Symfony\\Polyfill\\Intl\\Idn\\Info' => __DIR__ . '/..' . '/symfony/polyfill-intl-idn/Info.php',
diff --git a/vendor/composer/installed.php b/vendor/composer/installed.php
index b13892fd1c..d24788bd12 100644
--- a/vendor/composer/installed.php
+++ b/vendor/composer/installed.php
@@ -1,9 +1,9 @@
 <?php return array(
     'root' => array(
         'name' => 'getkirby/cms',
-        'pretty_version' => '3.7.5.3',
-        'version' => '3.7.5.3',
-        'reference' => NULL,
+        'pretty_version' => '3.7.5.4',
+        'version' => '3.7.5.4',
+        'reference' => null,
         'type' => 'kirby-cms',
         'install_path' => __DIR__ . '/../../',
         'aliases' => array(),
@@ -29,9 +29,9 @@
             'dev_requirement' => false,
         ),
         'getkirby/cms' => array(
-            'pretty_version' => '3.7.5.3',
-            'version' => '3.7.5.3',
-            'reference' => NULL,
+            'pretty_version' => '3.7.5.4',
+            'version' => '3.7.5.4',
+            'reference' => null,
             'type' => 'kirby-cms',
             'install_path' => __DIR__ . '/../../',
             'aliases' => array(),