From 5be6f38c4c8f1377f58ac5b6ca4e2d2fbfb2c68a Mon Sep 17 00:00:00 2001
From: Eric-Guo <eric.guocz@gmail.com>
Date: Wed, 29 Apr 2020 17:32:34 +0800
Subject: [PATCH] rubocop suggestion change

---
 lib/wechat/cipher.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/wechat/cipher.rb b/lib/wechat/cipher.rb
index 050f654e..a2cdb657 100644
--- a/lib/wechat/cipher.rb
+++ b/lib/wechat/cipher.rb
@@ -41,7 +41,7 @@ def pack(content, app_id)
 
     def unpack(msg)
       msg = decode_padding(msg)
-      msg_len = msg[16, 4].reverse.unpack('V')[0]
+      msg_len = msg[16, 4].reverse.unpack1('V')
       content = msg[20, msg_len]
       app_id = msg[(20 + msg_len)..-1]