diff --git a/src/main/asciidoc/models/design/inventory.puml b/src/main/asciidoc/models/design/inventory.puml
index d1e6247..2b37308 100644
--- a/src/main/asciidoc/models/design/inventory.puml
+++ b/src/main/asciidoc/models/design/inventory.puml
@@ -12,7 +12,7 @@ package Spring {
 package Salespoint {
     interface DataInitializer
     class Quantity
-    interface UniqueInventory << T > UniqueInventoryItem >>
+    interface UniqueInventory<T extends UniqueInventoryItem>
     class UniqueInventoryItem
 }
 
@@ -43,4 +43,4 @@ package catering.inventory {
 
 
 
-@enduml
\ No newline at end of file
+@enduml
diff --git a/src/main/asciidoc/models/design/inventory.svg b/src/main/asciidoc/models/design/inventory.svg
index 2dac2b4..5cb6762 100644
--- a/src/main/asciidoc/models/design/inventory.svg
+++ b/src/main/asciidoc/models/design/inventory.svg
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:450618987647bff483d8b373a1741ad9feba3bdd188857a5003991ac8759b173
-size 19580
+oid sha256:a192c14edfddc988a8dc3e9da88cfcd37c4ffd1da598eadbff5572e34b151435
+size 22328