diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
index e48e141..f07d7ca 100644
--- a/.github/workflows/php.yml
+++ b/.github/workflows/php.yml
@@ -10,8 +10,7 @@ jobs:
     strategy:
       matrix:
         php-version:
-          - 7.4
-          - 8.0
+          - 8.1
 
     steps:
     - uses: actions/checkout@v2
diff --git a/README.md b/README.md
index 6a31205..c25d8da 100644
--- a/README.md
+++ b/README.md
@@ -7,11 +7,17 @@ Custom PHP session handler for [Nette Framework](http://nette.org/) that uses My
 - [nette/database](https://github.com/nette/database) 3.1+
 - [nette/di](https://github.com/nette/utils) 3.0+
 - [nette/utils](https://github.com/nette/utils) 3.2+
-- PHP 7.4+
+- PHP 8.1+
 
 <details>
 <summary>Requirements for previous versions</summary>
 
+*Requirements for 2.2*
+- [nette/database](https://github.com/nette/database) 3.1+
+- [nette/di](https://github.com/nette/utils) 3.0+
+- [nette/utils](https://github.com/nette/utils) 3.2+
+- PHP 7.4+
+
 *Requirements for 2.1 (not supported anymore)*
 - [nette/database](https://github.com/nette/database) 2.4+
 - [nette/di](https://github.com/nette/utils) 2.4+
diff --git a/composer.json b/composer.json
index 80cf9bc..5303776 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
 		}
 	],
 	"require": {
-		"php": "^7.4 || ^8.0",
+		"php": "^8.1",
 		"nette/database": "^3.1",
 		"nette/di": "^3.0",
 		"nette/utils": "^3.2"
@@ -23,8 +23,8 @@
 		"nette/schema": "^1.2",
 		"php-parallel-lint/php-parallel-lint": "^1.3",
 		"php-parallel-lint/php-console-highlighter": "^0.5.0",
-		"phpstan/phpstan": "^0.12.99",
-		"phpstan/phpstan-nette": "^0.12.21",
+		"phpstan/phpstan": "^1.2",
+		"phpstan/phpstan-nette": "^1.0",
 		"spaze/coding-standard": "^0.0",
 		"spaze/encryption": "^0.4.0"
 	},
diff --git a/src/MysqlSessionHandler.php b/src/MysqlSessionHandler.php
index e4c7de9..ea10a0b 100644
--- a/src/MysqlSessionHandler.php
+++ b/src/MysqlSessionHandler.php
@@ -214,11 +214,7 @@ public function write($sessionId, $sessionData): bool
 	}
 
 
-	/**
-	 * @param int $maxLifeTime
-	 * @return bool
-	 */
-	public function gc($maxLifeTime): bool
+	public function gc(int $maxLifeTime): int|false
 	{
 		$maxTimestamp = \time() - $maxLifeTime;
 
@@ -235,11 +231,9 @@ public function gc($maxLifeTime): bool
 			$maxTimestamp -= ($row->serverId - 1) * \max(86400, $maxLifeTime / 10);
 		}
 
-		$this->explorer->table($this->tableName)
+		return $this->explorer->table($this->tableName)
 			->where('timestamp < ?', $maxTimestamp)
 			->delete();
-
-		return true;
 	}
 
 }