diff --git a/src/pocketmine/utils/Color.php b/src/pocketmine/utils/Color.php
index ad45ef14e..44483aa49 100644
--- a/src/pocketmine/utils/Color.php
+++ b/src/pocketmine/utils/Color.php
@@ -57,6 +57,8 @@ class Color{
 	 * Sets the alpha (opacity) value of this colour, lower = more transparent
 	 *
 	 * @param int $a
+	 *
+	 * @return void
 	 */
 	public function setA(int $a){
 		$this->a = $a & 0xff;
@@ -74,6 +76,8 @@ class Color{
 	 * Sets the red value of this colour.
 	 *
 	 * @param int $r
+	 *
+	 * @return void
 	 */
 	public function setR(int $r){
 		$this->r = $r & 0xff;
@@ -91,6 +95,8 @@ class Color{
 	 * Sets the green value of this colour.
 	 *
 	 * @param int $g
+	 *
+	 * @return void
 	 */
 	public function setG(int $g){
 		$this->g = $g & 0xff;
@@ -108,6 +114,8 @@ class Color{
 	 * Sets the blue value of this colour.
 	 *
 	 * @param int $b
+	 *
+	 * @return void
 	 */
 	public function setB(int $b){
 		$this->b = $b & 0xff;
diff --git a/src/pocketmine/utils/Config.php b/src/pocketmine/utils/Config.php
index 6110e47d2..0264fbb68 100644
--- a/src/pocketmine/utils/Config.php
+++ b/src/pocketmine/utils/Config.php
@@ -118,6 +118,8 @@ class Config{
 
 	/**
 	 * Removes all the changes in memory and loads the file again
+	 *
+	 * @return void
 	 */
 	public function reload(){
 		$this->config = [];
@@ -333,6 +335,8 @@ class Config{
 	/**
 	 * @param string $k
 	 * @param mixed  $v
+	 *
+	 * @return void
 	 */
 	public function __set($k, $v){
 		$this->set($k, $v);
@@ -357,6 +361,8 @@ class Config{
 	/**
 	 * @param string $key
 	 * @param mixed  $value
+	 *
+	 * @return void
 	 */
 	public function setNested($key, $value){
 		$vars = explode(".", $key);
@@ -446,6 +452,8 @@ class Config{
 	/**
 	 * @param string $k key to be set
 	 * @param mixed  $v value to set key
+	 *
+	 * @return void
 	 */
 	public function set($k, $v = true){
 		$this->config[$k] = $v;
@@ -459,6 +467,8 @@ class Config{
 
 	/**
 	 * @param array $v
+	 *
+	 * @return void
 	 */
 	public function setAll(array $v){
 		$this->config = $v;
@@ -483,6 +493,8 @@ class Config{
 
 	/**
 	 * @param string $k
+	 *
+	 * @return void
 	 */
 	public function remove($k){
 		unset($this->config[$k]);
@@ -500,6 +512,8 @@ class Config{
 
 	/**
 	 * @param array $defaults
+	 *
+	 * @return void
 	 */
 	public function setDefaults(array $defaults){
 		$this->fillDefaults($defaults, $this->config);
diff --git a/src/pocketmine/utils/MainLogger.php b/src/pocketmine/utils/MainLogger.php
index 14ba183ba..6b7debf14 100644
--- a/src/pocketmine/utils/MainLogger.php
+++ b/src/pocketmine/utils/MainLogger.php
@@ -121,6 +121,8 @@ class MainLogger extends \AttachableThreadedLogger{
 	 *
 	 * WARNING: Because static properties are thread-local, this MUST be called from the body of every Thread if you
 	 * want the logger to be accessible via {@link MainLogger#getLogger}.
+	 *
+	 * @return void
 	 */
 	public function registerStatic(){
 		if(static::$logger === null){
@@ -191,6 +193,8 @@ class MainLogger extends \AttachableThreadedLogger{
 
 	/**
 	 * @param bool $logDebug
+	 *
+	 * @return void
 	 */
 	public function setLogDebug(bool $logDebug){
 		$this->logDebug = $logDebug;
@@ -199,6 +203,8 @@ class MainLogger extends \AttachableThreadedLogger{
 	/**
 	 * @param \Throwable $e
 	 * @param array|null $trace
+	 *
+	 * @return void
 	 */
 	public function logException(\Throwable $e, $trace = null){
 		if($trace === null){
@@ -281,6 +287,9 @@ class MainLogger extends \AttachableThreadedLogger{
 		}
 	}
 
+	/**
+	 * @return void
+	 */
 	public function shutdown(){
 		$this->shutdown = true;
 		$this->notify();
@@ -291,6 +300,8 @@ class MainLogger extends \AttachableThreadedLogger{
 	 * @param string $level
 	 * @param string $prefix
 	 * @param string $color
+	 *
+	 * @return void
 	 */
 	protected function send($message, $level, $prefix, $color){
 		/** @var \DateTime|null $time */
@@ -326,6 +337,9 @@ class MainLogger extends \AttachableThreadedLogger{
 		});
 	}
 
+	/**
+	 * @return void
+	 */
 	public function syncFlushBuffer(){
 		$this->syncFlush = true;
 		$this->synchronized(function(){
@@ -352,6 +366,9 @@ class MainLogger extends \AttachableThreadedLogger{
 		}
 	}
 
+	/**
+	 * @return void
+	 */
 	public function run(){
 		$logResource = fopen($this->logFile, "ab");
 		if(!is_resource($logResource)){
diff --git a/src/pocketmine/utils/Random.php b/src/pocketmine/utils/Random.php
index b92763125..546c7b3ac 100644
--- a/src/pocketmine/utils/Random.php
+++ b/src/pocketmine/utils/Random.php
@@ -71,6 +71,8 @@ class Random{
 
 	/**
 	 * @param int $seed Integer to be used as seed.
+	 *
+	 * @return void
 	 */
 	public function setSeed(int $seed){
 		$this->seed = $seed;
diff --git a/src/pocketmine/utils/ServerKiller.php b/src/pocketmine/utils/ServerKiller.php
index 934585a9c..6f9e84f71 100644
--- a/src/pocketmine/utils/ServerKiller.php
+++ b/src/pocketmine/utils/ServerKiller.php
@@ -42,6 +42,9 @@ class ServerKiller extends Thread{
 		$this->time = $time;
 	}
 
+	/**
+	 * @return void
+	 */
 	public function run(){
 		$this->registerClassLoader();
 		$start = time();
diff --git a/src/pocketmine/utils/Terminal.php b/src/pocketmine/utils/Terminal.php
index c30f08e56..f368d5823 100644
--- a/src/pocketmine/utils/Terminal.php
+++ b/src/pocketmine/utils/Terminal.php
@@ -101,6 +101,9 @@ abstract class Terminal{
 		return $result;
 	}
 
+	/**
+	 * @return void
+	 */
 	protected static function getFallbackEscapeCodes(){
 		self::$FORMAT_BOLD = "\x1b[1m";
 		self::$FORMAT_OBFUSCATED = "";
@@ -128,6 +131,9 @@ abstract class Terminal{
 		self::$COLOR_WHITE = "\x1b[38;5;231m";
 	}
 
+	/**
+	 * @return void
+	 */
 	protected static function getEscapeCodes(){
 		self::$FORMAT_BOLD = `tput bold`;
 		self::$FORMAT_OBFUSCATED = `tput smacs`;