diff --git a/composer.json b/composer.json
index f33f696..8e25fb2 100644
--- a/composer.json
+++ b/composer.json
@@ -17,11 +17,11 @@
   "require": {
     "php": "^7.1|^8.0",
     "ext-pdo": "*",
-    "symfony/yaml": "^4.2|^5.2",
-    "pimple/pimple": "^3.2",
-    "cartalyst/collections": "^1.1",
-    "psr/log": "^1.1|^2.0",
-    "predis/predis": "^1.1",
+    "symfony/yaml": "^4.0|^5.0|^6.0",
+    "pimple/pimple": "^3.0",
+    "cartalyst/collections": "^1.1|^2.0",
+    "psr/log": "^1.1|^2.0|^3.0",
+    "predis/predis": "^1.1|^2.0",
     "phpmailer/phpmailer": "^6.0"
   },
   "require-dev": {
diff --git a/src/Gateway/RedisGatewayAbstract.php b/src/Gateway/RedisGatewayAbstract.php
index 680d2d8..8905963 100644
--- a/src/Gateway/RedisGatewayAbstract.php
+++ b/src/Gateway/RedisGatewayAbstract.php
@@ -46,7 +46,7 @@ public function __construct(RedisConfig $config)
 
     /**
      * @param string $key
-     * @param $value
+     * @param string $value
      * @return bool
      */
     protected function setKeyIfNotExists(string $key, string $value): bool
@@ -97,6 +97,6 @@ protected function pushToList(string $key, string $value): bool
      */
     protected function popFromList(string $key): ?string
     {
-        return $this->client->lpop($key) ?? null;
+        return $this->client->lpop($key);
     }
 }