diff --git a/.gitignore b/.gitignore
index 631b2b7..8cb4335 100644
--- a/.gitignore
+++ b/.gitignore
@@ -30,4 +30,6 @@ reports
 Gemfile.lock
 gemfiles/*.lock
 spec/examples.txt
-.byebug_history
\ No newline at end of file
+.byebug_history
+
+.DS_Store
\ No newline at end of file
diff --git a/pact-support.gemspec b/pact-support.gemspec
index 7f79237..a984465 100644
--- a/pact-support.gemspec
+++ b/pact-support.gemspec
@@ -34,4 +34,5 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "appraisal"
   spec.add_development_dependency "conventional-changelog", "~> 1.3"
   spec.add_development_dependency "bump", "~> 0.5"
+  spec.add_development_dependency "base64", "~> 0.2"
 end