diff --git a/gocardless_pro.gemspec b/gocardless_pro.gemspec
index 1d6c888..053c57c 100644
--- a/gocardless_pro.gemspec
+++ b/gocardless_pro.gemspec
@@ -22,7 +22,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'base64'
 
   spec.add_development_dependency 'rspec', '~> 3.13.2'
-  spec.add_development_dependency 'webmock', '~> 3.26.2'
+  spec.add_development_dependency 'webmock', '~> 3.26.3'
   spec.add_development_dependency 'rubocop', '~> 1.89.0'
   spec.add_development_dependency 'yard', '~> 0.9.45'
 end