diff --git a/source/module/items/M5Item.ts b/source/module/items/M5Item.ts
index 24b7c3f..786d868 100644
--- a/source/module/items/M5Item.ts
+++ b/source/module/items/M5Item.ts
@@ -343,7 +343,13 @@ export class M5Item extends Item {
 
 			if (item.type === "spell" || item.type === "kampfkunst") {
 				if (this.actor["system"].ap.value >= item.system.ap) {
-					this.actor["system"].ap.value -= item.system.ap;
+					this.actor["update"]({
+						data: {
+							ap: {
+								value: this.actor["system"].ap.value - item.system.ap,
+							},
+						},
+					});
 				}
 			}