diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0a693690..fe47935d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 5.0.5
+
+A release to deprecate `SecureHeaders::Configuration#get` in prep for 6.x
+
 ## 5.0.4
 
 - Adds support for `nonced_stylesheet_pack_tag` #373 (@paulfri)
diff --git a/secure_headers.gemspec b/secure_headers.gemspec
index 00f473b0..a3e32021 100644
--- a/secure_headers.gemspec
+++ b/secure_headers.gemspec
@@ -2,7 +2,7 @@
 # frozen_string_literal: true
 Gem::Specification.new do |gem|
   gem.name          = "secure_headers"
-  gem.version       = "5.0.4"
+  gem.version       = "5.0.5"
   gem.authors       = ["Neil Matatall"]
   gem.email         = ["neil.matatall@gmail.com"]
   gem.description   = "Manages application of security headers with many safe defaults."
@@ -17,13 +17,4 @@ Gem::Specification.new do |gem|
   gem.require_paths = ["lib"]
   gem.add_development_dependency "rake"
   gem.add_dependency "useragent", ">= 0.15.0"
-
-  # TODO: delete this after 4.1 is cut or a number of 4.0.x releases have occurred
-  gem.post_install_message = <<-POST_INSTALL
-
-**********
-:wave: secure_headers 5.0 introduces a lot of breaking changes (in the name of security!). It's highly likely you will need to update your secure_headers cookie configuration to avoid breaking things. See the upgrade guide for details: https://github.com/twitter/secureheaders/blob/master/docs/upgrading-to-5-0.md
-**********
-
-  POST_INSTALL
 end