diff --git a/CHANGELOG.md b/CHANGELOG.md
index bac32a8d..11c9df99 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Changelog
 
+## 5.18.0 - 2020-04-22
+* [#911](https://github.com/stripe/stripe-ruby/pull/911) Add support for `BillingPortal` namespace and `Session` resource and APIs
+
 ## 5.17.0 - 2020-02-26
 * [#907](https://github.com/stripe/stripe-ruby/pull/907) Add `StripeError#idempotent_replayed?`
 
diff --git a/VERSION b/VERSION
index ad95545a..391dca82 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-5.17.0
+5.18.0
diff --git a/lib/stripe/version.rb b/lib/stripe/version.rb
index 4271533c..416e4f22 100644
--- a/lib/stripe/version.rb
+++ b/lib/stripe/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Stripe
-  VERSION = "5.17.0"
+  VERSION = "5.18.0"
 end