diff --git a/composer.json b/composer.json
index 7c1592be0..7f33acac9 100644
--- a/composer.json
+++ b/composer.json
@@ -24,15 +24,15 @@
     "require": {
         "php": "^8.1",
         "bramus/monolog-colored-line-formatter": "^2.0.3",
-        "composer/installers": "^2.1.1",
-        "guzzlehttp/guzzle": "^7.4.5",
+        "composer/installers": "^2.2",
+        "guzzlehttp/guzzle": "^7.5.0",
         "guzzlehttp/psr7": "^2.4.0",
         "embed/embed": "^4.4.4",
         "league/csv": "^9.8.0",
         "m1/env": "^2.2.0",
-        "monolog/monolog": "^1.27.1",
-        "nikic/php-parser": "^4.14.0",
-        "psr/container": "^1.1.2",
+        "monolog/monolog": "^3.2.0",
+        "nikic/php-parser": "^4.15.0",
+        "psr/container": "^2.0",
         "silverstripe/config": "^2",
         "silverstripe/assets": "^2",
         "silverstripe/vendor-plugin": "^2",
@@ -100,8 +100,6 @@
         ]
     },
     "include-path": [
-        "src/",
-        "src/includes/",
         "thirdparty/"
     ],
     "scripts": {
@@ -111,4 +109,4 @@
     },
     "minimum-stability": "dev",
     "prefer-stable": true
-}
+}
\ No newline at end of file
diff --git a/src/Core/Injector/Injector.php b/src/Core/Injector/Injector.php
index 7136a605b..f845eb1a4 100644
--- a/src/Core/Injector/Injector.php
+++ b/src/Core/Injector/Injector.php
@@ -874,10 +874,8 @@ class Injector implements ContainerInterface
      *
      * Will recursively call itself for each depth of dotting.
      *
-     * @param string $name
-     * @return boolean
      */
-    public function has($name)
+    public function has(string $name): bool
     {
         return (bool)$this->getServiceName($name);
     }
diff --git a/src/Logging/DebugViewFriendlyErrorFormatter.php b/src/Logging/DebugViewFriendlyErrorFormatter.php
index 66f3be63c..6769c97e4 100644
--- a/src/Logging/DebugViewFriendlyErrorFormatter.php
+++ b/src/Logging/DebugViewFriendlyErrorFormatter.php
@@ -7,6 +7,7 @@ use SilverStripe\Dev\Debug;
 use SilverStripe\Control\Director;
 use SilverStripe\Control\Email\Email;
 use Monolog\Formatter\FormatterInterface;
+use Monolog\LogRecord;
 
 /**
  * Produce a friendly error message
@@ -101,7 +102,7 @@ class DebugViewFriendlyErrorFormatter implements FormatterInterface
         return $this;
     }
 
-    public function format(array $record)
+    public function format(array|LogRecord $record)
     {
         // Get error code
         $code = empty($record['code']) ? $this->getStatusCode() : $record['code'];
diff --git a/src/Logging/DetailedErrorFormatter.php b/src/Logging/DetailedErrorFormatter.php
index ac2622cbc..ed7f755d4 100644
--- a/src/Logging/DetailedErrorFormatter.php
+++ b/src/Logging/DetailedErrorFormatter.php
@@ -4,6 +4,7 @@ namespace SilverStripe\Logging;
 
 use SilverStripe\Dev\Debug;
 use Monolog\Formatter\FormatterInterface;
+use Monolog\LogRecord;
 use Exception;
 
 /**
@@ -11,7 +12,7 @@ use Exception;
  */
 class DetailedErrorFormatter implements FormatterInterface
 {
-    public function format(array $record)
+    public function format(array|LogRecord $record)
     {
         if (isset($record['context']['exception'])) {
             /** @var Exception $exception */
diff --git a/src/Logging/HTTPOutputHandler.php b/src/Logging/HTTPOutputHandler.php
index b09a671f3..dbc89c4f2 100644
--- a/src/Logging/HTTPOutputHandler.php
+++ b/src/Logging/HTTPOutputHandler.php
@@ -4,6 +4,7 @@ namespace SilverStripe\Logging;
 
 use Monolog\Formatter\FormatterInterface;
 use Monolog\Handler\AbstractProcessingHandler;
+use Monolog\LogRecord;
 use SilverStripe\Control\Controller;
 use SilverStripe\Control\Director;
 use SilverStripe\Control\HTTPResponse;
@@ -106,7 +107,7 @@ class HTTPOutputHandler extends AbstractProcessingHandler
      *
      * @return FormatterInterface
      */
-    public function getFormatter()
+    public function getFormatter(): FormatterInterface
     {
         if (Director::is_cli() && ($cliFormatter = $this->getCLIFormatter())) {
             return $cliFormatter;
@@ -120,7 +121,7 @@ class HTTPOutputHandler extends AbstractProcessingHandler
      *
      * @return FormatterInterface
      */
-    public function getDefaultFormatter()
+    public function getDefaultFormatter(): FormatterInterface
     {
         return parent::getFormatter();
     }
@@ -141,7 +142,7 @@ class HTTPOutputHandler extends AbstractProcessingHandler
      * @param array $record
      * @return bool
      */
-    protected function write(array $record)
+    protected function write(LogRecord $record): void
     {
         ini_set('display_errors', 0);
 
@@ -164,7 +165,5 @@ class HTTPOutputHandler extends AbstractProcessingHandler
 
         $response->setBody($record['formatted']);
         $response->output();
-
-        return false === $this->getBubble();
     }
 }
diff --git a/src/Logging/PreformattedEchoHandler.php b/src/Logging/PreformattedEchoHandler.php
index b7a4d6821..14f56b1d2 100644
--- a/src/Logging/PreformattedEchoHandler.php
+++ b/src/Logging/PreformattedEchoHandler.php
@@ -3,6 +3,7 @@
 namespace SilverStripe\Logging;
 
 use Monolog\Handler\AbstractProcessingHandler;
+use Monolog\LogRecord;
 
 /**
  * Echo the output as preformatted HTML, emulating console output in a browser.
@@ -17,10 +18,7 @@ use Monolog\Handler\AbstractProcessingHandler;
 class PreformattedEchoHandler extends AbstractProcessingHandler
 {
 
-    /**
-     * @param array $record
-     */
-    protected function write(array $record)
+    protected function write(LogRecord $record): void
     {
         echo sprintf('<pre>%s</pre>', htmlspecialchars($record['formatted'], ENT_QUOTES, 'UTF-8'));
     }