diff --git a/mpx-catapult.rb b/mpx-catapult.rb
index 330321b10470e162beb956cee0f43103ae941b0c..4d4204777391e8839a1b620fd214964caf9d3b57 100755
--- a/mpx-catapult.rb
+++ b/mpx-catapult.rb
@@ -52,8 +52,8 @@ class WebhookHandler < Goliath::API
 				'Authorization' => [token, secret]
 			}
 		).then { |http|
-			env.logger.debug "API response to send: #{http.response} "\
-				"with code #{http.response_header.status}"
+			env.logger.debug "API response code to send: " +
+				http.response_header.status.to_s
 
 			case http.response_header.status
 			when 200