diff --git a/phpBB/includes/acp/acp_styles.php b/phpBB/includes/acp/acp_styles.php
index fc33519882..1b22caca93 100644
--- a/phpBB/includes/acp/acp_styles.php
+++ b/phpBB/includes/acp/acp_styles.php
@@ -787,22 +787,26 @@ class acp_styles
 				// Style is already installed
 				continue;
 			}
-			$cfg = $this->read_style_cfg($dir);
-			if ($cfg === false)
+
+			try
 			{
-				// Invalid style.cfg
+				$style_data = $this->read_style_composer_file($dir);
+			}
+			catch (\DomainException $e)
+			{
+				// Invalid composer.json
 				continue;
 			}
 
 			// Style should be available for installation
-			$parent = $cfg['parent'];
+			$parent = $style_data['extra']['parent-style'];
 			$style = array(
 				'style_id'			=> 0,
-				'style_name'		=> $cfg['name'],
-				'style_copyright'	=> $cfg['copyright'],
+				'style_name'		=> $style_data['name'],
+				'style_copyright'	=> $style_data['license'],
 				'style_active'		=> 0,
 				'style_path'		=> $dir,
-				'bbcode_bitfield'	=> $cfg['template_bitfield'],
+				'bbcode_bitfield'	=> $style_data['extra']['template-bitfield'],
 				'style_parent_id'	=> 0,
 				'style_parent_tree'	=> '',
 				// Extra values for styles list
@@ -1107,7 +1111,7 @@ class acp_styles
 					continue;
 				}
 
-				if (file_exists("{$dir}/style.cfg"))
+				if (file_exists("{$dir}/composer.json"))
 				{
 					$styles[] = $file;
 				}
@@ -1135,43 +1139,44 @@ class acp_styles
 	}
 
 	/**
-	* Read style configuration file
-	*
-	* @param string $dir style directory
-	* @return array|bool Style data, false on error
-	*/
-	protected function read_style_cfg($dir)
+	 * Read style composer.json file
+	 *
+	 * @param string $dir style directory
+	 * @return array Style data
+	 * @throws \DomainException in case of error
+	 */
+	protected function read_style_composer_file($dir)
 	{
 		// This should never happen, we give them a red warning because of its relevance.
-		if (!file_exists($this->styles_path . $dir . '/style.cfg'))
+		if (!file_exists($this->styles_path . $dir . '/style.json'))
 		{
 			trigger_error($this->user->lang('NO_STYLE_CFG', $dir), E_USER_WARNING);
 		}
 
-		static $required = array('name', 'phpbb_version', 'copyright');
+		$json = file_get_contents($this->styles_path . $dir . '/composer.json');
+		$style_data = json_decode($json, true);
 
-		$cfg = parse_cfg_file($this->styles_path . $dir . '/style.cfg');
-
-		// Check if it is a valid file
-		foreach ($required as $key)
+		if (!is_array($style_data) || !isset($style_data['type']) || $style_data['type'] !== 'phpbb-style')
 		{
-			if (!isset($cfg[$key]))
-			{
-				return false;
-			}
+			throw new \DomainException('NO_VALID_STYLE');
+		}
+
+		if (!isset($style_data['extra']))
+		{
+			$style_data['extra'] = array();
 		}
 
 		// Check data
-		if (!isset($cfg['parent']) || !is_string($cfg['parent']) || $cfg['parent'] == $cfg['name'])
+		if (!isset($style_data['extra']['parent-style']) || !is_string($style_data['extra']['parent-style']) || $style_data['extra']['parent-style'] === $style_data['name'])
 		{
-			$cfg['parent'] = '';
+			$style_data['extra']['parent-style'] = '';
 		}
-		if (!isset($cfg['template_bitfield']))
+		if (!isset($style_data['extra']['template-bitfield']))
 		{
-			$cfg['template_bitfield'] = $this->default_bitfield();
+			$style_data['extra']['template-bitfield'] = $this->default_bitfield();
 		}
 
-		return $cfg;
+		return $style_data;
 	}
 
 	/**
diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php
index 72df25cc03..10c62ed3ea 100644
--- a/phpBB/includes/functions.php
+++ b/phpBB/includes/functions.php
@@ -2669,8 +2669,13 @@ function build_hidden_fields($field_ary, $specialchar = false, $stripslashes = f
 }
 
 /**
-* Parse cfg file
-*/
+ * Parse cfg file
+ * @param string $filename
+ * @param bool|array $lines
+ * @return array
+ *
+ * @deprecated Will be removed in the future as *.cfg files are being replaced by composer.json files
+ */
 function parse_cfg_file($filename, $lines = false)
 {
 	$parsed_items = array();
diff --git a/phpBB/phpbb/cache/service.php b/phpBB/phpbb/cache/service.php
index 2d4e55bfbb..982ff84ee6 100644
--- a/phpBB/phpbb/cache/service.php
+++ b/phpBB/phpbb/cache/service.php
@@ -344,7 +344,7 @@ class service
 			$parsed_array = array();
 		}
 
-		$filename = $this->phpbb_root_path . 'styles/' . $style['style_path'] . '/style.cfg';
+		$filename = $this->phpbb_root_path . 'styles/' . $style['style_path'] . '/composer.json';
 
 		if (!file_exists($filename))
 		{
@@ -354,7 +354,8 @@ class service
 		if (!isset($parsed_array['filetime']) || (($this->config['load_tplcompile'] && @filemtime($filename) > $parsed_array['filetime'])))
 		{
 			// Re-parse cfg file
-			$parsed_array = parse_cfg_file($filename);
+			$json = file_get_contents($filename);
+			$parsed_array = json_decode($json, true);
 			$parsed_array['filetime'] = @filemtime($filename);
 
 			$this->driver->put('_cfg_' . $style['style_path'], $parsed_array);
diff --git a/phpBB/phpbb/db/migration/data/v310/style_update_p1.php b/phpBB/phpbb/db/migration/data/v310/style_update_p1.php
index a7e30a9cb7..2b3fc0b670 100644
--- a/phpBB/phpbb/db/migration/data/v310/style_update_p1.php
+++ b/phpBB/phpbb/db/migration/data/v310/style_update_p1.php
@@ -69,10 +69,11 @@ class style_update_p1 extends \phpbb\db\migration\migration
 		$skip_dirs = array('.', '..', 'prosilver');
 		foreach ($iterator as $fileinfo)
 		{
-			if ($fileinfo->isDir() && !in_array($fileinfo->getFilename(), $skip_dirs) && file_exists($fileinfo->getPathname() . '/style.cfg'))
+			if ($fileinfo->isDir() && !in_array($fileinfo->getFilename(), $skip_dirs) && file_exists($fileinfo->getPathname() . '/composer.json'))
 			{
-				$style_cfg = parse_cfg_file($fileinfo->getPathname() . '/style.cfg');
-				if (isset($style_cfg['phpbb_version']) && version_compare($style_cfg['phpbb_version'], '3.1.0-dev', '>='))
+				$json = file_get_contents($fileinfo->getPathname() . '/composer.json');
+				$style_data = json_decode($json, true);
+				if (isset($style_data['extra']['phpbb-version']) && version_compare($style_data['extra']['phpbb-version'], '3.1.0-dev', '>='))
 				{
 					// 3.1 style
 					$available_styles[] = $fileinfo->getFilename();
diff --git a/phpBB/phpbb/db/migration/data/v31x/style_update.php b/phpBB/phpbb/db/migration/data/v31x/style_update.php
index a5f99b5d28..36f1209c71 100644
--- a/phpBB/phpbb/db/migration/data/v31x/style_update.php
+++ b/phpBB/phpbb/db/migration/data/v31x/style_update.php
@@ -49,11 +49,8 @@ class style_update extends \phpbb\db\migration\migration
 		// Install prosilver if no style is available and prosilver can be installed
 		if (empty($style_paths) && in_array('prosilver', $styles))
 		{
-			// Try to parse config file
-			$cfg = parse_cfg_file($this->phpbb_root_path . 'styles/prosilver/style.cfg');
-
-			// Stop running this if prosilver cfg file can't be read
-			if (empty($cfg))
+			// Stop running this if prosilver composer.json file can't be read
+			if (file_exists($this->phpbb_root_path . 'styles/prosilver/composer.json'))
 			{
 				throw new \RuntimeException('No styles available and could not fall back to prosilver.');
 			}
@@ -123,7 +120,7 @@ class style_update extends \phpbb\db\migration\migration
 					continue;
 				}
 
-				if (file_exists("{$dir}/style.cfg"))
+				if (file_exists("{$dir}/composer.json"))
 				{
 					$styles[] = $file;
 				}
diff --git a/phpBB/styles/prosilver/composer.json b/phpBB/styles/prosilver/composer.json
new file mode 100644
index 0000000000..77a52095d7
--- /dev/null
+++ b/phpBB/styles/prosilver/composer.json
@@ -0,0 +1,29 @@
+{
+	"name": "prosilver",
+	"description": "phpBB Forum Software default style",
+	"type": "phpbb-style",
+	"version": "3.2.0-a1-dev",
+	"homepage": "https://www.phpbb.com",
+	"license": "GPL-2.0",
+	"authors": [
+		{
+			"name": "phpBB Limited",
+			"email": "operations@phpbb.com",
+			"homepage": "https://www.phpbb.com/go/authors"
+		}
+	],
+	"support": {
+		"issues": "https://tracker.phpbb.com",
+		"forum": "https://www.phpbb.com/community/",
+		"wiki": "https://wiki.phpbb.com",
+		"irc": "irc://irc.freenode.org/phpbb"
+	},
+	"require": {
+		"php": ">=5.3.3"
+	},
+	"extra": {
+		"display-name": "prosilver",
+		"parent-style": "prosilver",
+		"phpbb-version": "3.2.0-a1-dev"
+	}
+}
diff --git a/phpBB/styles/prosilver/style.cfg b/phpBB/styles/prosilver/style.cfg
deleted file mode 100644
index 0f795e6a60..0000000000
--- a/phpBB/styles/prosilver/style.cfg
+++ /dev/null
@@ -1,32 +0,0 @@
-#
-# phpBB Style Configuration File
-#
-# This file is part of the phpBB Forum Software package.
-#
-# @copyright (c) phpBB Limited <https://www.phpbb.com>
-# @license GNU General Public License, version 2 (GPL-2.0)
-#
-# For full copyright and license information, please see
-# the docs/CREDITS.txt file.
-#
-# At the left is the name, please do not change this
-# At the right the value is entered
-#
-# Values get trimmed, if you want to add a space in front or at the end of
-# the value, then enclose the value with single or double quotes.
-# Single and double quotes do not need to be escaped.
-#
-#
-
-# General Information about this style
-name = prosilver
-copyright = © phpBB Limited, 2007
-style_version = 4.0.0-a1-dev
-phpbb_version = 4.0.0-a1-dev
-
-# Defining a different template bitfield
-# template_bitfield = //g=
-
-# Parent style
-# Set value to empty or to this style's name if this style does not have a parent style
-parent = prosilver