diff --git a/app/templates/includes/resources/diagrams/er-diagrams/annotation-full.html b/app/templates/includes/resources/diagrams/er-diagrams/annotation-full.html
index 49ef0b1..082de43 100644
--- a/app/templates/includes/resources/diagrams/er-diagrams/annotation-full.html
+++ b/app/templates/includes/resources/diagrams/er-diagrams/annotation-full.html
@@ -2,7 +2,7 @@
     Annotation ||--|| hasAggregateRating : Has
     Annotation ||--o| TombstoneMetadata : Has
     TombstoneMetadata ||--o{ RelatedPID : Has
-    TombstoneMetadata ||--|{ Agent
+    TombstoneMetadata ||--|{ Agent : Has
     Annotation ||--o{ Agent : Has
     Agent ||--|{ Role : Has
     Agent ||--o{ Identifier : Has
diff --git a/app/templates/includes/resources/diagrams/er-diagrams/data-mapping-full.html b/app/templates/includes/resources/diagrams/er-diagrams/data-mapping-full.html
index a4b9dfa..983fbb7 100644
--- a/app/templates/includes/resources/diagrams/er-diagrams/data-mapping-full.html
+++ b/app/templates/includes/resources/diagrams/er-diagrams/data-mapping-full.html
@@ -4,4 +4,4 @@
     DataMapping ||--|{ Agent : Has
     Agent ||--|{ Role : Has
     Agent ||--o{ Identifier : Has
-    TombstoneMetadata ||--|{ Agent
\ No newline at end of file
+    TombstoneMetadata ||--|{ Agent : Has
\ No newline at end of file