diff --git a/CHANGELOG.md b/CHANGELOG.md
index ce300b8..732ad2f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # CHANGELOG
 
+## 1.5.0-rc.4 - 2018-05-28
+
+- Add authentication option ([#89])
+
+[#89]: https://github.com/fewlinesco/bamboo_smtp/pull/89
+
 ## 1.5.0-rc.3 - 2018-04-04
 
 - Add no_mx_lookups option to gen_smtp config ([#82])
diff --git a/mix.exs b/mix.exs
index c51d096..7ad8ec0 100644
--- a/mix.exs
+++ b/mix.exs
@@ -5,7 +5,7 @@ defmodule BambooSmtp.Mixfile do
 
   def project do
     [app: :bamboo_smtp,
-     version: "1.5.0-rc.3",
+     version: "1.5.0-rc.4",
      elixir: "~> 1.4",
      source_url: @project_url,
      homepage_url: @project_url,