diff --git a/composer.json b/composer.json
index 46182d7..853f4c2 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
 		"php": ">=5.4.0"
 	},
 	"require-dev": {
-		"nette/tester": "~1.7.0"
+		"nette/tester": "^1.7 || ^2.0"
 	},
 	"suggest": {
 		"ext-curl": "Allows you to use Http\\CurlClient"
diff --git a/src/Github/Paginator.php b/src/Github/Paginator.php
index 8829d5f..7405b53 100644
--- a/src/Github/Paginator.php
+++ b/src/Github/Paginator.php
@@ -57,6 +57,7 @@ public function limit($limit)
 	/**
 	 * @return void
 	 */
+	#[\ReturnTypeWillChange]
 	public function rewind()
 	{
 		$this->request = $this->firstRequest;
@@ -68,6 +69,7 @@ public function rewind()
 	/**
 	 * @return bool
 	 */
+	#[\ReturnTypeWillChange]
 	public function valid()
 	{
 		return $this->request !== NULL && ($this->limit === NULL || $this->counter < $this->limit);
@@ -77,6 +79,7 @@ public function valid()
 	/**
 	 * @return Http\Response
 	 */
+	#[\ReturnTypeWillChange]
 	public function current()
 	{
 		$this->load();
@@ -87,6 +90,7 @@ public function current()
 	/**
 	 * @return int
 	 */
+	#[\ReturnTypeWillChange]
 	public function key()
 	{
 		return static::parsePage($this->request->getUrl());
@@ -96,11 +100,12 @@ public function key()
 	/**
 	 * @return void
 	 */
+	#[\ReturnTypeWillChange]
 	public function next()
 	{
 		$this->load();
 
-		if ($url = static::parseLink($this->response->getHeader('Link'), 'next')) {
+		if ($url = static::parseLink((string) $this->response->getHeader('Link'), 'next')) {
 			$this->request = new Http\Request(
 				$this->request->getMethod(),
 				$url,