From 00d537442633121236ef8038aa780039f298a128 Mon Sep 17 00:00:00 2001
From: Pranav Phlagun <pranavpc@users.noreply.github.com>
Date: Thu, 30 Aug 2018 12:16:36 +0800
Subject: [PATCH] Fixes bug in JsonPacker

---
 src/Packer/JsonPacker.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Packer/JsonPacker.php b/src/Packer/JsonPacker.php
index 1e1eac4..1fa58e8 100644
--- a/src/Packer/JsonPacker.php
+++ b/src/Packer/JsonPacker.php
@@ -54,7 +54,7 @@ public function pack($value)
      */
     public function unpack($packed)
     {
-        if (is_string($packed)) {
+        if (!is_string($packed)) {
             throw new InvalidArgumentException("packed value should be a string");
         }