diff --git a/app/models/site/deploy_dependencies.rb b/app/models/site/deploy_dependencies.rb
index b807f0e8..b40d8d04 100644
--- a/app/models/site/deploy_dependencies.rb
+++ b/app/models/site/deploy_dependencies.rb
@@ -8,7 +8,7 @@ class Site
 
     included do
       def deployment_graph
-        @deployment_graph ||= RGL::AdjacencyGraph.new.tap do |graph|
+        @deployment_graph ||= RGL::DirectedAdjacencyGraph.new.tap do |graph|
           deploys.each do |deploy|
             graph.add_vertex deploy
           end