diff --git a/Additional_Notes/sequence_diagram_step.uml b/Additional_Notes/sequence_diagram_step.plantuml
similarity index 89%
rename from Additional_Notes/sequence_diagram_step.uml
rename to Additional_Notes/sequence_diagram_step.plantuml
index 93f0d89..440fd92 100644
--- a/Additional_Notes/sequence_diagram_step.uml
+++ b/Additional_Notes/sequence_diagram_step.plantuml
@@ -30,7 +30,7 @@ M.Collab -> M.Core: build_in(configuration)
 activate M.Core
 M.Collab <-- M.Core: return configuration
 deactivate M.Core
-M.Collab -> M.Recommend : getRecommendation(configuration)
+M.Collab -> M.Recommend : getRecommendation(configuration, preferences)
 activate M.Recommend
 
 par
diff --git a/Additional_Notes/sequence_diagram_step_alternatives.uml b/Additional_Notes/sequence_diagram_step_alternatives.plantuml
similarity index 89%
rename from Additional_Notes/sequence_diagram_step_alternatives.uml
rename to Additional_Notes/sequence_diagram_step_alternatives.plantuml
index dcba882..b295d92 100644
--- a/Additional_Notes/sequence_diagram_step_alternatives.uml
+++ b/Additional_Notes/sequence_diagram_step_alternatives.plantuml
@@ -30,7 +30,7 @@ M.Collab -> M.Core: build_in(configuration)
 activate M.Core
 M.Collab <-- M.Core: return alternatives
 deactivate M.Core
-M.Collab -> M.Recommend : getRecommendation(alternatives)
+M.Collab -> M.Recommend : getRecommendation(alternatives, preferences)
 activate M.Recommend
 M.Collab <-- M.Recommend : return recommendedAlternatives
 deactivate M.Recommend