From 8a28f701ba6ad6f98d53748145e52de08fe94712 Mon Sep 17 00:00:00 2001
From: PaulZi <pavel.zimakoff@gmail.com>
Date: Tue, 30 May 2017 17:31:00 +0300
Subject: [PATCH] Signed depth warning

---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index 7c06b4b..72756d5 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,8 @@ to the `require` section of your `composer.json` file.
 
 ## Migrations example
 
+Warning! `depth` attribute can not be unsigned!
+
 Single tree migration:
 
 ```php