diff --git a/lib/jenkins_api_client/cli/helper.rb b/lib/jenkins_api_client/cli/helper.rb
index 37366bed..5afc787d 100644
--- a/lib/jenkins_api_client/cli/helper.rb
+++ b/lib/jenkins_api_client/cli/helper.rb
@@ -21,6 +21,7 @@
 #
 
 require 'fileutils'
+require 'yaml'
 
 module JenkinsApi
   module CLI