diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2a0dbd6..b0f9e14 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,12 @@
 <!-- This file is generated, please add to it using `knope document-change` in the client-library-templates repo -->
 # Changelog
 
+## 4.15.0 (2026-10-02)
+
+### Features
+
+- Fixed response_body_truncated, response_headers_content_truncated, and response_headers_count_truncated fields on Webhooks to correctly allow null values.
+
 ## 4.14.0 (2026-10-02)
 
 ### Features
diff --git a/lib/gocardless_pro/client.rb b/lib/gocardless_pro/client.rb
index 386a279..23f689b 100644
--- a/lib/gocardless_pro/client.rb
+++ b/lib/gocardless_pro/client.rb
@@ -283,7 +283,7 @@ def default_options
           'User-Agent' => "#{user_agent}",
           'Content-Type' => 'application/json',
           'GoCardless-Client-Library' => 'gocardless-pro-ruby',
-          'GoCardless-Client-Version' => '4.14.0',
+          'GoCardless-Client-Version' => '4.15.0',
         },
       }
     end
diff --git a/lib/gocardless_pro/version.rb b/lib/gocardless_pro/version.rb
index b2cda44..31ad223 100644
--- a/lib/gocardless_pro/version.rb
+++ b/lib/gocardless_pro/version.rb
@@ -3,5 +3,5 @@ module GoCardlessPro
 
 module GoCardlessPro
   # Current version of the GC gem
-  VERSION = '4.14.0'
+  VERSION = '4.15.0'
 end