diff --git a/src/Monolog/Handler/RedisHandler.php b/src/Monolog/Handler/RedisHandler.php
index 938eee6b..91d16eaf 100644
--- a/src/Monolog/Handler/RedisHandler.php
+++ b/src/Monolog/Handler/RedisHandler.php
@@ -30,7 +30,7 @@ use Monolog\Logger;
  */
 class RedisHandler extends AbstractProcessingHandler
 {
-    /** @var \Predis\Client|\Redis */
+    /** @var \Predis\Client<\Predis\Client>|\Redis */
     private $redisClient;
     /** @var string */
     private $redisKey;
@@ -38,7 +38,7 @@ class RedisHandler extends AbstractProcessingHandler
     protected $capSize;
 
     /**
-     * @param \Predis\Client|\Redis $redis   The redis instance
+     * @param \Predis\Client<\Predis\Client>|\Redis $redis   The redis instance
      * @param string                $key     The key name to push records to
      * @param int                   $capSize Number of entries to limit list size to, 0 = unlimited
      */
diff --git a/src/Monolog/Handler/RedisPubSubHandler.php b/src/Monolog/Handler/RedisPubSubHandler.php
index f9fede8e..7789309c 100644
--- a/src/Monolog/Handler/RedisPubSubHandler.php
+++ b/src/Monolog/Handler/RedisPubSubHandler.php
@@ -28,13 +28,13 @@ use Monolog\Logger;
  */
 class RedisPubSubHandler extends AbstractProcessingHandler
 {
-    /** @var \Predis\Client|\Redis */
+    /** @var \Predis\Client<\Predis\Client>|\Redis */
     private $redisClient;
     /** @var string */
     private $channelKey;
 
     /**
-     * @param \Predis\Client|\Redis $redis The redis instance
+     * @param \Predis\Client<\Predis\Client>|\Redis $redis The redis instance
      * @param string                $key   The channel key to publish records to
      */
     public function __construct($redis, string $key, $level = Logger::DEBUG, bool $bubble = true)
diff --git a/src/Monolog/Handler/StreamHandler.php b/src/Monolog/Handler/StreamHandler.php
index 3550c8c1..65183512 100644
--- a/src/Monolog/Handler/StreamHandler.php
+++ b/src/Monolog/Handler/StreamHandler.php
@@ -212,7 +212,7 @@ class StreamHandler extends AbstractProcessingHandler
             set_error_handler([$this, 'customErrorHandler']);
             $status = mkdir($dir, 0777, true);
             restore_error_handler();
-            if (false === $status && !is_dir($dir) && strpos($this->errorMessage, 'File exists') !== false) {
+            if (false === $status && !is_dir($dir) && strpos((string) $this->errorMessage, 'File exists') === false) {
                 throw new \UnexpectedValueException(sprintf('There is no existing directory at "%s" and it could not be created: '.$this->errorMessage, $dir));
             }
         }