diff --git a/lib/redmine_mattermost/listener.rb b/lib/redmine_mattermost/listener.rb
index 8a379c8..ae1db42 100644
--- a/lib/redmine_mattermost/listener.rb
+++ b/lib/redmine_mattermost/listener.rb
@@ -159,8 +159,8 @@ class MattermostListener < Redmine::Hook::Listener
 				client.ssl_config.ssl_version = :auto
 				client.post_async url, {:payload => params.to_json}
 			rescue Exception => e
-				logger.warn("cannot connect to #{url}")
-				logger.warn(e)
+				Rails.logger.warn("cannot connect to #{url}")
+				Rails.logger.warn(e)
 			end
 		end
 	end