diff --git a/lib/redmine_mattermost/listener.rb b/lib/redmine_mattermost/listener.rb
index a4164f2..a8f92ef 100644
--- a/lib/redmine_mattermost/listener.rb
+++ b/lib/redmine_mattermost/listener.rb
@@ -71,15 +71,30 @@ class MattermostListener < Redmine::Hook::Listener
 
 		repository = changeset.repository
 
-		revision_url = Rails.application.routes.url_for(
-			:controller => 'repositories',
-			:action => 'revision',
-			:id => repository.project,
-			:repository_id => repository.identifier_param,
-			:rev => changeset.revision,
-			:host => Setting.host_name,
-			:protocol => Setting.protocol
-		)
+		if Setting.host_name.to_s =~ /\A(https?\:\/\/)?(.+?)(\:(\d+))?(\/.+)?\z/i
+			host, port, prefix = $2, $4, $5
+			revision_url = Rails.application.routes.url_for(
+				:controller => 'repositories',
+				:action => 'revision',
+				:id => repository.project,
+				:repository_id => repository.identifier_param,
+				:rev => changeset.revision,
+				:host => host,
+				:protocol => Setting.protocol,
+				:port => port,
+				:script_name => prefix
+			)
+		else
+			revision_url = Rails.application.routes.url_for(
+				:controller => 'repositories',
+				:action => 'revision',
+				:id => repository.project,
+				:repository_id => repository.identifier_param,
+				:rev => changeset.revision,
+				:host => Setting.host_name,
+				:protocol => Setting.protocol
+			)
+		end
 
 		attachment = {}
 		attachment[:text] = ll(Setting.default_language, :text_status_changed_by_changeset, "<#{revision_url}|#{escape changeset.comments}>")
@@ -127,7 +142,12 @@ private
 	end
 
 	def object_url(obj)
-		Rails.application.routes.url_for(obj.event_url({:host => Setting.host_name, :protocol => Setting.protocol}))
+		if Setting.host_name.to_s =~ /\A(https?\:\/\/)?(.+?)(\:(\d+))?(\/.+)?\z/i
+			host, port, prefix = $2, $4, $5
+			Rails.application.routes.url_for(obj.event_url({:host => host, :protocol => Setting.protocol, :port => port, :script_name => prefix}))
+		else
+			Rails.application.routes.url_for(obj.event_url({:host => Setting.host_name, :protocol => Setting.protocol}))
+		end
 	end
 
 	def url_for_project(proj)