diff --git a/README.md b/README.md
index 86e7707..34edf67 100644
--- a/README.md
+++ b/README.md
@@ -9,8 +9,8 @@
 * Contributors:      Stefan Kalscheuer
 * Tags:              liveticker, feed, rss
 * Requires at least: 4.0
-* Tested up to:      5.3
-* Requires PHP:      5.2
+* Tested up to:      5.4
+* Requires PHP:      5.6
 * Stable tag:        1.0.0
 * License:           GPLv2 or later
 * License URI:       http://www.gnu.org/licenses/gpl-2.0.html
@@ -81,6 +81,7 @@ caching time of 12 hours obviously makes no sense.
 
 ### 1.1.0 - unreleased
 
+* Requires PHP 5.6 or above
 * Use GMT for automatic updates 
 * Gutenberg Block available
 
diff --git a/RoboFile.php b/RoboFile.php
index e9cf36b..36929f6 100644
--- a/RoboFile.php
+++ b/RoboFile.php
@@ -95,6 +95,8 @@ class RoboFile extends Tasks {
 	/**
 	 * Run code style tests
 	 *
+	 * @param array $opts Options.
+	 *
 	 * @return void
 	 */
 	public function testCS(
@@ -109,7 +111,7 @@ class RoboFile extends Tasks {
 		$this->say( 'Executing PHPCS...' );
 		$this->_exec( __DIR__ . '/vendor/bin/phpcs --standard=phpcs.xml -s' );
 
-		if ( $opts[self::OPT_NODE] ) {
+		if ( $opts[ self::OPT_NODE ] ) {
 			$this->say( 'Executing ESLint...' );
 			$this->_exec( __DIR__ . '/node_modules/eslint/bin/eslint.js ' . __DIR__ . '/scripts/block.js' );
 			$this->_exec( __DIR__ . '/node_modules/eslint/bin/eslint.js ' . __DIR__ . '/scripts/liveticker.js' );
@@ -145,7 +147,7 @@ class RoboFile extends Tasks {
 		if ( isset( $opts[ self::OPT_SKIPSTYLE ] ) && true === $opts[ self::OPT_SKIPSTYLE ] ) {
 			$this->say( 'Style checks skipped' );
 		} else {
-			$this->testCS($opts);
+			$this->testCS( $opts );
 		}
 		$this->bundle();
 	}
@@ -157,21 +159,23 @@ class RoboFile extends Tasks {
 	 */
 	private function bundle() {
 		$this->say( 'Bundling resources...' );
-		$this->taskCopyDir( array(
-			'includes' => $this->target_dir . '/' . $this->final_name . '/includes',
-			'scripts'  => $this->target_dir . '/' . $this->final_name . '/scripts',
-			'styles'   => $this->target_dir . '/' . $this->final_name . '/styles',
-			'views'    => $this->target_dir . '/' . $this->final_name . '/views',
-		) )->run();
+		$this->taskCopyDir(
+			array(
+				'includes' => $this->target_dir . '/' . $this->final_name . '/includes',
+				'scripts'  => $this->target_dir . '/' . $this->final_name . '/scripts',
+				'styles'   => $this->target_dir . '/' . $this->final_name . '/styles',
+				'views'    => $this->target_dir . '/' . $this->final_name . '/views',
+			)
+		)->run();
 		$this->_copy( 'stklcode-liveticker.php', $this->target_dir . '/' . $this->final_name . '/stklcode-liveticker.php' );
 		$this->_copy( 'README.md', $this->target_dir . '/' . $this->final_name . '/README.md' );
 		$this->_copy( 'LICENSE.md', $this->target_dir . '/' . $this->final_name . '/LICENSE.md' );
 
 		// Remove content before title (e.g. badges) from README file.
 		$this->taskReplaceInFile( $this->target_dir . '/' . $this->final_name . '/README.md' )
-		     ->regex( '/^[^\\#]*/' )
-		     ->to( '' )
-		     ->run();
+			->regex( '/^[^\\#]*/' )
+			->to( '' )
+			->run();
 	}
 
 	/**
diff --git a/composer.json b/composer.json
index f4a2f45..aea584a 100644
--- a/composer.json
+++ b/composer.json
@@ -17,11 +17,11 @@
   ],
   "type": "wordpress-plugin",
   "require": {
-    "php": ">=5.2",
+    "php": ">=5.6",
     "composer/installers": "~1.7"
   },
   "require-dev": {
-    "php": ">=5.2",
+    "php": ">=7",
     "consolidation/robo": "^2",
     "phpunit/phpunit": "*",
     "phpunit/php-code-coverage": "*",
diff --git a/includes/class-scliveticker-admin.php b/includes/class-admin.php
similarity index 98%
rename from includes/class-scliveticker-admin.php
rename to includes/class-admin.php
index ca0f1e1..3d89bfd 100644
--- a/includes/class-scliveticker-admin.php
+++ b/includes/class-admin.php
@@ -4,9 +4,11 @@
  *
  * This file contains the derived class for the plugin's administration features.
  *
- * @package Liveticker
+ * @package SCLiveticker
  */
 
+namespace SCLiveticker;
+
 // Exit if accessed directly.
 if ( ! defined( 'ABSPATH' ) ) {
 	exit;
@@ -15,7 +17,7 @@ if ( ! defined( 'ABSPATH' ) ) {
 /**
  * Liveticker admin configuration.
  */
-class SCLiveticker_Admin extends SCLiveticker {
+class Admin extends SCLiveticker {
 	/**
 	 * Add to Right Now Widget
 	 *
diff --git a/includes/class-scliveticker.php b/includes/class-scliveticker.php
index e7264e6..b398c12 100644
--- a/includes/class-scliveticker.php
+++ b/includes/class-scliveticker.php
@@ -4,14 +4,19 @@
  *
  * This file contains the plugin's base class.
  *
- * @package Liveticker
+ * @package SCLiveticker
  */
 
+namespace SCLiveticker;
+
+use WP_Query;
+
 // Exit if accessed directly.
 if ( ! defined( 'ABSPATH' ) ) {
 	exit;
 }
 
+
 /**
  * Liveticker.
  */
@@ -92,11 +97,11 @@ class SCLiveticker {
 		// Admin only actions.
 		if ( is_admin() ) {
 			// Add dashboard "right now" functionality.
-			add_action( 'right_now_content_table_end', array( 'SCLiveticker_Admin', 'dashboard_right_now' ) );
+			add_action( 'right_now_content_table_end', array( 'SCLiveticker\\Admin', 'dashboard_right_now' ) );
 
 			// Settings.
-			add_action( 'admin_init', array( 'SCLiveticker_Admin', 'register_settings' ) );
-			add_action( 'admin_menu', array( 'SCLiveticker_Admin', 'register_settings_page' ) );
+			add_action( 'admin_init', array( 'SCLiveticker\\Admin', 'register_settings' ) );
+			add_action( 'admin_menu', array( 'SCLiveticker\\Admin', 'register_settings_page' ) );
 		}
 	}
 
@@ -457,19 +462,7 @@ class SCLiveticker {
 	 * @since 1.1
 	 */
 	private static function block_present() {
-		// We are in WP 5.x environment and blocks are generally present.
-		if ( function_exists( 'has_blocks' ) && has_blocks() ) {
-			/*
-			 * The slightly faster call to ‌has_block( 'scliveticker/ticker' ) produces an "undefined function" error for
-			 * no good reason. Iteration over pased blocks however works fine.
-			 */
-			foreach ( parse_blocks( get_post()->post_content ) as $b ) {
-				if ( 'scliveticker/ticker' === $b['blockName'] ) {
-					return true;
-				}
-			}
-		}
-
-		return false;
+		return function_exists( 'has_block' ) && // We are in WP 5.x environment.
+			has_block( 'scliveticker/ticker' ); // Specific block is present.
 	}
 }
diff --git a/includes/class-scliveticker-system.php b/includes/class-system.php
similarity index 93%
rename from includes/class-scliveticker-system.php
rename to includes/class-system.php
index 99ae593..5810bde 100644
--- a/includes/class-scliveticker-system.php
+++ b/includes/class-system.php
@@ -4,9 +4,13 @@
  *
  * This file contains the derived class for the plugin's system operations.
  *
- * @package Liveticker
+ * @package SCLiveticker
  */
 
+namespace SCLiveticker;
+
+use WP_Query;
+
 // Exit if accessed directly.
 if ( ! defined( 'ABSPATH' ) ) {
 	exit;
@@ -15,7 +19,7 @@ if ( ! defined( 'ABSPATH' ) ) {
 /**
  *  Liveticker system configuration.
  */
-class SCLiveticker_System extends SCLiveticker {
+class System extends SCLiveticker {
 
 	/**
 	 * Activation hook.
diff --git a/includes/class-scliveticker-widget.php b/includes/class-widget.php
similarity index 97%
rename from includes/class-scliveticker-widget.php
rename to includes/class-widget.php
index ee31ec2..727388e 100644
--- a/includes/class-scliveticker-widget.php
+++ b/includes/class-widget.php
@@ -4,17 +4,22 @@
  *
  * This file contains the liveticker widget.
  *
- * @package Liveticker
+ * @package SCLiveticker
  */
 
+namespace SCLiveticker;
+
+use WP_Query;
+use WP_Widget;
+
 if ( ! defined( 'ABSPATH' ) ) {
 	exit;
 }
 
 /**
- * Class SCLiveticker_Widget.
+ * Class Widget.
  */
-class SCLiveticker_Widget extends WP_Widget {
+class Widget extends WP_Widget {
 
 	/**
 	 * SCLiveticker_Widget constructor.
diff --git a/phpcs.xml b/phpcs.xml
index 392db5b..c2039c1 100644
--- a/phpcs.xml
+++ b/phpcs.xml
@@ -18,6 +18,6 @@
 	</rule>
 
 	<!-- PHP compatibility level -->
-	<config name="testVersion" value="5.2-"/>
+	<config name="testVersion" value="5.6-"/>
 	<rule ref="PHPCompatibility"/>
 </ruleset>
diff --git a/stklcode-liveticker.php b/stklcode-liveticker.php
index 4d3aff3..07ba943 100644
--- a/stklcode-liveticker.php
+++ b/stklcode-liveticker.php
@@ -41,22 +41,22 @@ define( 'SCLIVETICKER_BASE', plugin_dir_url( __FILE__ ) );
 define( 'SCLIVETICKER_BASENAME', plugin_basename( __FILE__ ) );
 
 // System Hooks.
-add_action( 'init', array( 'SCLiveticker', 'register_types' ) );
-add_action( 'plugins_loaded', array( 'SCLiveticker', 'init' ) );
-register_activation_hook( SCLIVETICKER_FILE, array( 'SCLiveticker_System', 'activate' ) );
-register_uninstall_hook( SCLIVETICKER_FILE, array( 'SCLiveticker_System', 'uninstall' ) );
+add_action( 'init', array( 'SCLiveticker\\SCLiveticker', 'register_types' ) );
+add_action( 'plugins_loaded', array( 'SCLiveticker\\SCLiveticker', 'init' ) );
+register_activation_hook( SCLIVETICKER_FILE, array( 'SCLiveticker\\System', 'activate' ) );
+register_uninstall_hook( SCLIVETICKER_FILE, array( 'SCLiveticker\\System', 'uninstall' ) );
 
 // Allow shortcodes in widgets.
 add_filter( 'widget_text', 'do_shortcode' );
 
 // Add shortcode.
-add_shortcode( 'liveticker', array( 'SCLiveticker', 'shortcode_ticker_show' ) );
+add_shortcode( 'liveticker', array( 'SCLiveticker\\SCLiveticker', 'shortcode_ticker_show' ) );
 
 // Add Widget.
-add_action( 'widgets_init', array( 'SCLiveticker_Widget', 'register' ) );
+add_action( 'widgets_init', array( 'SCLiveticker\\Widget', 'register' ) );
 
 // Add Gutenberg block.
-add_action( 'enqueue_block_editor_assets', array( 'SCLiveticker_Admin', 'register_block' ) );
+add_action( 'enqueue_block_editor_assets', array( 'SCLiveticker\\Admin', 'register_block' ) );
 
 // Autoload.
 spl_autoload_register( 'scliveticker_autoload' );
@@ -70,16 +70,16 @@ spl_autoload_register( 'scliveticker_autoload' );
  */
 function scliveticker_autoload( $class ) {
 	$plugin_classes = array(
-		'SCLiveticker',
-		'SCLiveticker_Admin',
-		'SCLiveticker_System',
-		'SCLiveticker_Widget',
+		'SCLiveticker\\SCLiveticker',
+		'SCLiveticker\\Admin',
+		'SCLiveticker\\System',
+		'SCLiveticker\\Widget',
 	);
 	if ( in_array( $class, $plugin_classes, true ) ) {
 		require_once sprintf(
 			'%s/includes/class-%s.php',
 			SCLIVETICKER_DIR,
-			strtolower( str_replace( '_', '-', $class ) )
+			strtolower( str_replace( '_', '-', substr( $class, 13 ) ) )
 		);
 	}
 }