diff --git a/RedisCache.php b/RedisCache.php
index b3b6972..89fd857 100644
--- a/RedisCache.php
+++ b/RedisCache.php
@@ -197,7 +197,7 @@ class RedisCache
         {
             foreach ($patterns as $pattern)
             {
-                $cursor = NULL;
+                $cursor = 0;//NULL;
                 foreach ($patterns as $pattern)
                 {
                     $arKeys = [];
@@ -383,7 +383,7 @@ class RedisCache
         $result = Yii::$app->redis->keys(self::calculateKey('del:*'));
         foreach ($result as $val)
         {
-            $cursor = null;
+            $cursor = 0;//null;
             $key = str_replace(self::prefix(), '', $val);
             $pattern = '*';
             $arKeys = [];
diff --git a/composer.json b/composer.json
index ea5aa84..1c6d9d1 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
     "require": {
         "yiisoft/yii2-redis": "~2.0.0",
         "yiisoft/yii2": "~2.0.0",
-        "predis/predis": "^2.3"
+        "predis/predis": "^3.0.1"
     },
     "autoload": {
         "psr-4": {