diff --git a/Context/AsyncContext.php b/Context/AsyncContext.php
index c2ab25d..a438c77 100644
--- a/Context/AsyncContext.php
+++ b/Context/AsyncContext.php
@@ -62,9 +62,9 @@ class AsyncContext implements ContextInterface
 	 * @param string $id
 	 * @param int $value
 	 * @param int|null $coroutineId
-	 * @return bool|int
+	 * @return int
 	 */
-	public static function increment(string $id, int $value = 1, ?int $coroutineId = null): bool|int
+	public static function increment(string $id, int $value = 1, ?int $coroutineId = null): int
 	{
 		if (!isset(static::$context[$id])) {
 			static::$context[$id] = 0;
@@ -76,9 +76,9 @@ class AsyncContext implements ContextInterface
 	 * @param string $id
 	 * @param int $value
 	 * @param int|null $coroutineId
-	 * @return bool|int
+	 * @return int
 	 */
-	public static function decrement(string $id, int $value = 1, ?int $coroutineId = null): bool|int
+	public static function decrement(string $id, int $value = 1, ?int $coroutineId = null): int
 	{
 		if (!isset(static::$context[$id])) {
 			static::$context[$id] = 0;
diff --git a/Context/ContextInterface.php b/Context/ContextInterface.php
index 10526d0..1da1e0d 100644
--- a/Context/ContextInterface.php
+++ b/Context/ContextInterface.php
@@ -41,19 +41,19 @@ interface ContextInterface
 	/**
 	 * @param string $id
 	 * @param int $value
-	 * @param $coroutineId
-	 * @return bool|int
+	 * @param null $coroutineId
+	 * @return int
 	 */
-	public static function increment(string $id, int $value = 1, $coroutineId = null): bool|int;
+	public static function increment(string $id, int $value = 1, $coroutineId = null): int;
 
 
 	/**
 	 * @param string $id
 	 * @param int $value
-	 * @param $coroutineId
-	 * @return bool|int
+	 * @param null $coroutineId
+	 * @return int
 	 */
-	public static function decrement(string $id, int $value = 1, $coroutineId = null): bool|int;
+	public static function decrement(string $id, int $value = 1, $coroutineId = null): int;
 
 
 }
diff --git a/Context/CoroutineContext.php b/Context/CoroutineContext.php
index af0e39d..84e925b 100644
--- a/Context/CoroutineContext.php
+++ b/Context/CoroutineContext.php
@@ -72,9 +72,9 @@ class CoroutineContext implements ContextInterface
 	 * @param string $id
 	 * @param int $value
 	 * @param int|null $coroutineId
-	 * @return bool|int
+	 * @return int
 	 */
-	public static function increment(string $id, int $value = 1, ?int $coroutineId = null): bool|int
+	public static function increment(string $id, int $value = 1, ?int $coroutineId = null): int
 	{
 		if (is_null($coroutineId)) {
 			$coroutineId = Coroutine::getCid();
@@ -89,9 +89,9 @@ class CoroutineContext implements ContextInterface
 	 * @param string $id
 	 * @param int $value
 	 * @param int|null $coroutineId
-	 * @return bool|int
+	 * @return int
 	 */
-	public static function decrement(string $id, int $value = 1, ?int $coroutineId = null): bool|int
+	public static function decrement(string $id, int $value = 1, ?int $coroutineId = null): int
 	{
 		if (is_null($coroutineId)) {
 			$coroutineId = Coroutine::getCid();