diff --git a/README.md b/README.md
index c4abc84..f73f888 100644
--- a/README.md
+++ b/README.md
@@ -11,12 +11,13 @@ CLI util to operate with large objects in small blocks size
 export FS object to blockchain namespace
 
 ```
-php kevacoin/put.php processor filename [length]
+php kevacoin/put.php processor filename [length] [delay]
 ```
 
 * `processor` - path to `kevacoin-cli`
 * `filename`  - file path to store in blockchain
 * `length`    - optional split size, 3072 bytes [max](https://kevacoin.org/faq.html)
+* `delay`     - optional seconds of parts sending delay to prevent `too-long-mempool-chain` reject, 60 by default
 
 ### get
 
diff --git a/kevacoin/put.php b/kevacoin/put.php
index 2222322..27b63a3 100644
--- a/kevacoin/put.php
+++ b/kevacoin/put.php
@@ -60,5 +60,16 @@ if (!empty($kevaNamespace->namespaceId))
         );
 
         print_r($kevaPut);
+
+        $delay = isset($argv[4]) ? (int) $argv[4] : 60;
+
+        echo sprintf(
+            '%s/%s sent, waiting %s seconds...' . PHP_EOL,
+            $key + 1,
+            count($parts),
+            $delay
+        );
+
+        sleep($delay);
     }
 }
\ No newline at end of file