From 1f5de8ee43618bc9e1703fd3f0346266eb6a96d6 Mon Sep 17 00:00:00 2001
From: James Nugent <james@jen20.com>
Date: Mon, 23 Nov 2015 15:10:38 +0200
Subject: [PATCH] Update CHANGELOG.md

---
 CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8c3d26e41..2e15388c5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -68,6 +68,7 @@ BUG FIXES:
   * provider/aws: Fix issue with order of Termincation Policies in AutoScaling Groups. 
       This will introduce plans on upgrade to this version, in order to correct the ordering [GH-2890]
   * provider/aws: Allow cluster name, not only ARN for `aws_ecs_service` [GH-3668]
+  * provider/aws: Fix a bug where a non-lower-cased `maintenance_window` can cause unnecessary planned changes [GH-4020]
   * provider/aws: Only set `weight` on an `aws_route53_record` if it has been set in configuration [GH-3900]
   * provider/aws: ignore association not exist on route table destroy [GH-3615]
   * provider/aws: Fix policy encoding issue with SNS Topics [GH-3700]