diff --git a/README.md b/README.md
index 2a042d9..3f2d90b 100644
--- a/README.md
+++ b/README.md
@@ -1,58 +1,2 @@
 # cache-php
 Cache tools for PHP applications
-
-### Memory
-
-Extends [PHP memcached](https://www.php.net/manual/en/book.memcached.php)
-
-#### Init
-
-```
-$memory = new \Yggverse\Cache\Memory(
-
-  'localhost',  // memcached server host, localhost by default
-  11211,        // memcached server port, 11211 by default
-
-  'my_app',     // application namespace
-  3600 + time() // cache time by default
-);
-```
-
-#### Supported methods
-
-##### Memory::set
-
-##### Memory::delete
-
-##### Memory::flush
-
-##### Memory::get
-
-##### Memory::getByValueCallback
-
-Return cached or cache new value of plain value callback
-
-```
-  $value = $memory->getByValueCallback(
-    'key_name',    // string, unique key name
-    'value',       // mixed, plain value
-    3600 + time(), // optional, cache timeout for this value
-  );
-```
-
-##### Memory::getByMethodCallback
-
-Return cached or cache new value of object method callback
-
-```
-  $value = $memory->getByMethodCallback(
-    $class_object,         // object of method class
-    'method_name',         // object method name
-    [
-      $method_attribute_1, // optional, array of attributes callback method requires
-      $method_attribute_2,
-      ...
-    ]
-    3600 + time(),         // optional, cache timeout for this value
-  );
-```
\ No newline at end of file
diff --git a/src/Memory.php b/src/Memory.php
index 3bc6858..5f06f29 100644
--- a/src/Memory.php
+++ b/src/Memory.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Yggverse\Cache;
+namespace YGGverse\Cache;
 
 class Memory {
 
@@ -19,7 +19,7 @@ class Memory {
     $this->_timeout   = $timeout;
   }
 
-  public function get(mixed $key) : mixed
+  public function get(string $key) : mixed
   {
     $key = $this->_setKey(
       [
@@ -31,7 +31,7 @@ class Memory {
     return $this->_memcached->get($key);
   }
 
-  public function set(mixed $key, mixed $value = null, int $timeout = null) : bool
+  public function set(string $key, mixed $value = null, int $timeout = null) : bool
   {
     $key = $this->_setKey(
       [
@@ -40,10 +40,10 @@ class Memory {
       ]
     );
 
-    return $this->_memcached->set($key, $value, ($timeout ? $timeout : $this->_timeout));
+    return $this->_memcached->set($key, $value, ($timeout ? $timeout : $this->_timeout) + time());
   }
 
-  public function delete(mixed $key) : bool
+  public function delete(string $key) : bool
   {
     $key = $this->_setKey(
       [
@@ -55,7 +55,7 @@ class Memory {
     return $this->_memcached->delete($key);
   }
 
-  public function getByValueCallback(mixed $key, mixed $value = null, int $timeout = null) : mixed
+  public function getByValueCallback(string $key, mixed $value = null, int $timeout = null) : mixed
   {
     $key = $this->_setKey(
       [
@@ -70,7 +70,7 @@ class Memory {
     }
     else
     {
-      if (true === $this->_memcached->set($key, $value, ($timeout ? $timeout : $this->_timeout)))
+      if (true === $this->_memcached->set($key, $value, ($timeout ? $timeout : $this->_timeout) + time()))
       {
         return $value;
       }
@@ -106,7 +106,7 @@ class Memory {
         $arguments
       );
 
-      if (true === $this->_memcached->set($key, $value, ($timeout ? $timeout : $this->_timeout)))
+      if (true === $this->_memcached->set($key, $value, ($timeout ? $timeout : $this->_timeout) + time()))
       {
         return $value;
       }
@@ -117,11 +117,9 @@ class Memory {
     }
   }
 
-  public function flush(?int $delay = 0) : bool
+  public function flush(int $delay = 60) : bool
   {
-    return $this->_memcached->flush(
-      $delay
-    );
+    return $this->_memcached->flush();
   }
 
   private function _setKey(mixed $key) : string