diff --git a/module/sheets/actor-sheet.mjs b/module/sheets/actor-sheet.mjs
index 72b5bf2..0673be3 100644
--- a/module/sheets/actor-sheet.mjs
+++ b/module/sheets/actor-sheet.mjs
@@ -137,7 +137,7 @@ export class VermineActorSheet extends ActorSheet {
     // Get the type of item to create.
     const type = header.dataset.type;
     // Grab any data associated with this control.
-    const data = duplicate(header.dataset);
+    const data = foundry.utils.duplicate(header.dataset);
     // Initialize a default name.
     // const name = `New ${type.capitalize()}`;
     const name = game.i18n.localize('ITEMS.new_' + type);
diff --git a/module/sheets/creature-sheet.mjs b/module/sheets/creature-sheet.mjs
index 7d5fa23..430f194 100644
--- a/module/sheets/creature-sheet.mjs
+++ b/module/sheets/creature-sheet.mjs
@@ -145,7 +145,7 @@ export class VermineCreatureSheet extends VermineActorSheet {
     // Get the type of item to create.
     const type = header.dataset.type;
     // Grab any data associated with this control.
-    const data = duplicate(header.dataset);
+    const data = foundry.utils.duplicate(header.dataset);
     // Initialize a default name.
     // const name = `New ${type.capitalize()}`;
     const name = game.i18n.localize('ITEMS.new_' + type);