diff --git a/package-lock.json b/package-lock.json
index f9b1dfbe..58ddfec0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2678,7 +2678,7 @@
       }
     },
     "foundry-pc-types": {
-      "version": "git+https://git.f3l.de/dungeonslayers/foundry-pc-types.git#211c36bdde13400f02421dc0f911b255767dac76",
+      "version": "git+https://git.f3l.de/dungeonslayers/foundry-pc-types.git#4ae5653e74e79bb6b4bd23b094dee066a0c7723a",
       "from": "git+https://git.f3l.de/dungeonslayers/foundry-pc-types.git#f3l-fixes",
       "dev": true,
       "requires": {
diff --git a/src/module/actor/actor-data.ts b/src/module/actor/actor-data.ts
index 93bb7883..a202f15f 100644
--- a/src/module/actor/actor-data.ts
+++ b/src/module/actor/actor-data.ts
@@ -9,7 +9,7 @@ interface DS4ActorDataAttributes {
     mind: ExtensibleData<number>;
 }
 
-interface ExtensibleData<T extends any> {
+interface ExtensibleData<T> {
     initial: T;
 }
 
diff --git a/src/module/actor/actor-sheet.ts b/src/module/actor/actor-sheet.ts
index 29d5f878..5ca03bfe 100644
--- a/src/module/actor/actor-sheet.ts
+++ b/src/module/actor/actor-sheet.ts
@@ -1,3 +1,4 @@
+import { DS4ItemDataType } from "../item/item-data";
 import { DS4Actor } from "./actor";
 import { DS4ActorDataType } from "./actor-data";
 
@@ -5,7 +6,7 @@ import { DS4ActorDataType } from "./actor-data";
  * Extend the basic ActorSheet with some very simple modifications
  * @extends {ActorSheet}
  */
-export class DS4ActorSheet extends ActorSheet<DS4ActorDataType, DS4Actor> {
+export class DS4ActorSheet extends ActorSheet<DS4ActorDataType, DS4Actor, DS4ItemDataType> {
     /**
      * This method returns the data for the template of the actor sheet.
      * It explicitly adds the items of the object sorted by type in the
@@ -88,7 +89,7 @@ export class DS4ActorSheet extends ActorSheet<DS4ActorDataType, DS4Actor> {
             data: data,
         };
         // Remove the type from the dataset since it's in the itemData.type prop.
-        delete itemData.data["type"];
+        delete itemData.data.type;
 
         // Finally, create the item!
         return this.actor.createOwnedItem(itemData);
diff --git a/src/module/actor/actor.ts b/src/module/actor/actor.ts
index 5f67e96e..40717808 100644
--- a/src/module/actor/actor.ts
+++ b/src/module/actor/actor.ts
@@ -1,10 +1,12 @@
+import { DS4Item } from "../item/item";
+import { DS4ItemDataType } from "../item/item-data";
 import { DS4ActorDataType } from "./actor-data";
 
 /**
  * Extend the base Actor entity by defining a custom roll data structure which is ideal for the Simple system.
  * @extends {Actor}
  */
-export class DS4Actor extends Actor<DS4ActorDataType> {
+export class DS4Actor extends Actor<DS4ActorDataType, DS4ItemDataType, DS4Item> {
     /** @override */
     prepareDerivedData(): void {
         const data = this.data;
diff --git a/src/module/item/item-sheet.ts b/src/module/item/item-sheet.ts
index d6798804..b060341e 100644
--- a/src/module/item/item-sheet.ts
+++ b/src/module/item/item-sheet.ts
@@ -59,7 +59,7 @@ export class DS4ItemSheet extends ItemSheet<DS4ItemDataType, DS4Item> {
         html.find(".effect-edit").on("click", (ev) => {
             const li = $(ev.currentTarget).parents(".effect");
             console.log(li.data("effectId"));
-            const effect = this.item["effects"].get(li.data("effectId")); // TODO: replace ["..."]
+            const effect = this.item.effects.get(li.data("effectId"));
             effect.sheet.render(true);
         });
 
diff --git a/src/module/item/item.ts b/src/module/item/item.ts
index 87a15b1e..c32f0cfe 100644
--- a/src/module/item/item.ts
+++ b/src/module/item/item.ts
@@ -1,10 +1,12 @@
+import { DS4Actor } from "../actor/actor";
+import { DS4ActorDataType } from "../actor/actor-data";
 import { DS4ItemDataType } from "./item-data";
 
 /**
  * Extend the basic Item with some very simple modifications.
  * @extends {Item}
  */
-export class DS4Item extends Item<DS4ItemDataType> {
+export class DS4Item extends Item<DS4ItemDataType, DS4ActorDataType, DS4Actor> {
     /**
      * Augment the basic Item data model with additional dynamic data.
      */