diff --git a/system/HTTP/CURLRequest.php b/system/HTTP/CURLRequest.php
index d1d4ace131..20e1fa3237 100644
--- a/system/HTTP/CURLRequest.php
+++ b/system/HTTP/CURLRequest.php
@@ -617,7 +617,7 @@ class CURLRequest extends Request
         // Debug
         if ($config['debug']) {
             $curlOptions[CURLOPT_VERBOSE] = 1;
-            $curlOptions[CURLOPT_STDERR]  = is_string($config['debug']) ? fopen($config['debug'], 'a+') : fopen('php://stderr', 'w');
+            $curlOptions[CURLOPT_STDERR]  = is_string($config['debug']) ? fopen($config['debug'], 'a+b') : fopen('php://stderr', 'wb');
         }
 
         // Decode Content
diff --git a/system/HTTP/Files/UploadedFile.php b/system/HTTP/Files/UploadedFile.php
index e73cea9238..351ffa7de2 100644
--- a/system/HTTP/Files/UploadedFile.php
+++ b/system/HTTP/Files/UploadedFile.php
@@ -177,7 +177,7 @@ class UploadedFile extends File implements UploadedFileInterface
             mkdir($path, 0777, true);
             //create the index.html file
             if (! is_file($path . 'index.html')) {
-                $file = fopen($path . 'index.html', 'x+');
+                $file = fopen($path . 'index.html', 'x+b');
                 fclose($file);
             }
         }
diff --git a/tests/system/Log/Handlers/FileHandlerTest.php b/tests/system/Log/Handlers/FileHandlerTest.php
index dca8d3ad1b..ef55dcbbc6 100644
--- a/tests/system/Log/Handlers/FileHandlerTest.php
+++ b/tests/system/Log/Handlers/FileHandlerTest.php
@@ -56,7 +56,7 @@ final class FileHandlerTest extends CIUnitTestCase
         vfsStream::newFile($expected)->at(vfsStream::setup('root'))->withContent('This is a test log');
         $logger->handle('warning', 'This is a test log');
 
-        $fp   = fopen($config->handlers['Tests\Support\Log\Handlers\TestHandler']['path'] . $expected, 'r');
+        $fp   = fopen($config->handlers['Tests\Support\Log\Handlers\TestHandler']['path'] . $expected, 'rb');
         $line = fgets($fp);
         fclose($fp);
 
@@ -75,7 +75,7 @@ final class FileHandlerTest extends CIUnitTestCase
         $expected = 'log-' . date('Y-m-d') . '.log';
         vfsStream::newFile($expected)->at(vfsStream::setup('root'))->withContent('Test message');
         $logger->handle('debug', 'Test message');
-        $fp   = fopen($config->handlers['Tests\Support\Log\Handlers\TestHandler']['path'] . $expected, 'r');
+        $fp   = fopen($config->handlers['Tests\Support\Log\Handlers\TestHandler']['path'] . $expected, 'rb');
         $line = fgets($fp); // and get the second line
         fclose($fp);
 
diff --git a/utils/PhpCsFixer/CodeIgniter4.php b/utils/PhpCsFixer/CodeIgniter4.php
index 47faf8c231..09838317af 100644
--- a/utils/PhpCsFixer/CodeIgniter4.php
+++ b/utils/PhpCsFixer/CodeIgniter4.php
@@ -121,23 +121,30 @@ final class CodeIgniter4 extends AbstractRuleset
                 'annotation_include'                         => ['@internal'],
                 'consider_absent_docblock_as_internal_class' => false,
             ],
-            'function_to_constant'        => true,
-            'heredoc_indentation'         => ['indentation' => 'start_plus_one'],
-            'heredoc_to_nowdoc'           => true,
-            'increment_style'             => ['style' => 'post'],
-            'indentation_type'            => true,
-            'lambda_not_used_import'      => true,
-            'line_ending'                 => true,
-            'linebreak_after_opening_tag' => true,
-            'list_syntax'                 => ['syntax' => 'short'],
-            'logical_operators'           => true,
-            'lowercase_cast'              => true,
-            'lowercase_keywords'          => true,
-            'lowercase_static_reference'  => true,
-            'magic_constant_casing'       => true,
-            'magic_method_casing'         => true,
-            'mb_str_functions'            => false,
-            'method_argument_space'       => [
+            'final_public_method_for_abstract_class' => false,
+            'fopen_flag_order'                       => true,
+            'fopen_flags'                            => ['b_mode' => true],
+            'full_opening_tag'                       => true,
+            'fully_qualified_strict_types'           => true,
+            'function_declaration'                   => ['closure_function_spacing' => 'one'],
+            'function_typehint_space'                => true,
+            'function_to_constant'                   => true,
+            'heredoc_indentation'                    => ['indentation' => 'start_plus_one'],
+            'heredoc_to_nowdoc'                      => true,
+            'increment_style'                        => ['style' => 'post'],
+            'indentation_type'                       => true,
+            'lambda_not_used_import'                 => true,
+            'line_ending'                            => true,
+            'linebreak_after_opening_tag'            => true,
+            'list_syntax'                            => ['syntax' => 'short'],
+            'logical_operators'                      => true,
+            'lowercase_cast'                         => true,
+            'lowercase_keywords'                     => true,
+            'lowercase_static_reference'             => true,
+            'magic_constant_casing'                  => true,
+            'magic_method_casing'                    => true,
+            'mb_str_functions'                       => false,
+            'method_argument_space'                  => [
                 'after_heredoc'                    => false,
                 'keep_multiple_spaces_after_comma' => false,
                 'on_multiline'                     => 'ensure_fully_multiline',