diff --git a/package-lock.json b/package-lock.json
index 4bf17502..f9b1dfbe 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#a94b1270e74d5e139c7c5d361764d9b0bc505c6f",
+      "version": "git+https://git.f3l.de/dungeonslayers/foundry-pc-types.git#211c36bdde13400f02421dc0f911b255767dac76",
       "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 d6575c24..93bb7883 100644
--- a/src/module/actor/actor-data.ts
+++ b/src/module/actor/actor-data.ts
@@ -1,2 +1,26 @@
-// TODO: Actually add a type for data
-export type DS4ActorDataType = unknown;
+export interface DS4ActorDataType {
+    attributes: DS4ActorDataAttributes;
+    traits: DS4ActorDataTraits;
+}
+
+interface DS4ActorDataAttributes {
+    body: BodyAttribute;
+    mobility: ExtensibleData<number>;
+    mind: ExtensibleData<number>;
+}
+
+interface ExtensibleData<T extends any> {
+    initial: T;
+}
+
+// Blueprint in case we need more detailed differentiation
+type BodyAttribute = ExtensibleData<number>;
+
+interface DS4ActorDataTraits {
+    strength: ExtensibleData<number>;
+    constitution: ExtensibleData<number>;
+    agility: ExtensibleData<number>;
+    dexterity: ExtensibleData<number>;
+    intellect: ExtensibleData<number>;
+    aura: ExtensibleData<number>;
+}
diff --git a/src/module/actor/actor-sheet.ts b/src/module/actor/actor-sheet.ts
index 4a16bfa7..43af361c 100644
--- a/src/module/actor/actor-sheet.ts
+++ b/src/module/actor/actor-sheet.ts
@@ -19,18 +19,6 @@ export class DS4ActorSheet extends ActorSheet<DS4ActorDataType, DS4Actor> {
 
     /* -------------------------------------------- */
 
-    /** @override */
-    getData(): ActorSheetData<DS4ActorDataType> {
-        // TODO: replace ["..."] access with .
-        const data = super.getData();
-        data["dtypes"] = ["String", "Number", "Boolean"];
-        for (const attr of Object.values(data.data["attributes"])) {
-            attr["isCheckbox"] = attr["dtype"] === "Boolean";
-        }
-        console.log(data);
-        return data;
-    }
-
     /** @override */
     activateListeners(html: JQuery): void {
         super.activateListeners(html);
@@ -39,17 +27,17 @@ export class DS4ActorSheet extends ActorSheet<DS4ActorDataType, DS4Actor> {
         if (!this.options.editable) return;
 
         // Add Inventory Item
-        html.find(".item-create").click(this._onItemCreate.bind(this));
+        html.find(".item-create").on("click", this._onItemCreate.bind(this));
 
         // Update Inventory Item
-        html.find(".item-edit").click((ev) => {
+        html.find(".item-edit").on("click", (ev) => {
             const li = $(ev.currentTarget).parents(".item");
             const item = this.actor.getOwnedItem(li.data("itemId"));
             item.sheet.render(true);
         });
 
         // Delete Inventory Item
-        html.find(".item-delete").click((ev) => {
+        html.find(".item-delete").on("click", (ev) => {
             const li = $(ev.currentTarget).parents(".item");
             this.actor.deleteOwnedItem(li.data("itemId"));
             li.slideUp(200, () => this.render(false));
@@ -66,7 +54,7 @@ export class DS4ActorSheet extends ActorSheet<DS4ActorDataType, DS4Actor> {
      * @param {Event} event   The originating click event
      * @private
      */
-    _onItemCreate(event: JQuery.ClickEvent): Promise<Item> {
+    private _onItemCreate(event: JQuery.ClickEvent): Promise<Item> {
         event.preventDefault();
         const header = event.currentTarget;
         // Get the type of item to create.
@@ -93,13 +81,13 @@ export class DS4ActorSheet extends ActorSheet<DS4ActorDataType, DS4Actor> {
      * @param {Event} event   The originating click event
      * @private
      */
-    _onRoll(event: JQuery.ClickEvent): void {
+    private _onRoll(event: JQuery.ClickEvent): void {
         event.preventDefault();
         const element = event.currentTarget;
         const dataset = element.dataset;
 
         if (dataset.roll) {
-            const roll = new Roll(dataset.roll, this.actor.data.data as Record<string, unknown>);
+            const roll = new Roll(dataset.roll, this.actor.data.data);
             const label = dataset.label ? `Rolling ${dataset.label}` : "";
             roll.roll().toMessage({
                 speaker: ChatMessage.getSpeaker({ actor: this.actor }),
diff --git a/src/module/actor/actor.ts b/src/module/actor/actor.ts
index 38292ed7..5f67e96e 100644
--- a/src/module/actor/actor.ts
+++ b/src/module/actor/actor.ts
@@ -11,29 +11,27 @@ export class DS4Actor extends Actor<DS4ActorDataType> {
         this._prepareCombatValues(data);
     }
 
-    _prepareCombatValues(data: ActorData<DS4ActorDataType>): void {
+    private _prepareCombatValues(data: ActorData<DS4ActorDataType>): void {
         const hitPointsModifier = getProperty(data, "data.combatValues.hitPoints.modifier") || 0;
+        const actorData = data.data;
         setProperty(
             data,
             "data.combatValues.hitPoints.max",
-            data.data["attributes"]["body"].initial + // TODO: replace ["..."]
-                data.data["traits"]["constitution"].initial + // TODO: replace ["..."]
-                10 +
-                hitPointsModifier,
+            actorData.attributes.body.initial + actorData.traits.constitution.initial + 10 + hitPointsModifier,
         );
 
         const defenseModifier = getProperty(data, "data.combatValues.defense.modifier") || 0;
         setProperty(
             data,
             "data.combatValues.defense.value",
-            data.data["attributes"]["body"].initial + // TODO: replace ["..."]
-                data.data["traits"]["constitution"].initial + // TODO: replace ["..."]
+            actorData.attributes.body.initial +
+                actorData.traits.constitution.initial +
                 this._getArmorValue() +
                 defenseModifier,
         );
     }
 
-    _getArmorValue(): number {
+    private _getArmorValue(): number {
         return this.data["items"]
             .filter((item) => ["armor", "shield"].includes(item.type))
             .filter((item) => item.data.equipped)
diff --git a/src/module/config.ts b/src/module/config.ts
index 4c7b53df..777c6a6b 100644
--- a/src/module/config.ts
+++ b/src/module/config.ts
@@ -1,11 +1,11 @@
 export const DS4 = {
     // ASCII Artwork
-    ASCII: `_____________________________________________________________________________________________
- ____  _   _ _   _  ____ _____ ___  _   _ ____  _        _ __   _______ ____  ____    _  _   
-|  _ \\| | | | \\ | |/ ___| ____/ _ \\| \\ | / ___|| |      / \\\\ \\ / / ____|  _ \\/ ___|  | || |  
-| | | | | | |  \\| | |  _|  _|| | | |  \\| \\___ \\| |     / _ \\\\ V /|  _| | |_) \\___ \\  | || |_ 
-| |_| | |_| | |\\  | |_| | |__| |_| | |\\  |___) | |___ / ___ \\| | | |___|  _ < ___) | |__   _|
-|____/ \\___/|_| \\_|\\____|_____\\___/|_| \\_|____/|_____/_/   \\_\\_| |_____|_| \\_\\____/     |_|  
+    ASCII: String.raw`_____________________________________________________________________________________________
+ ____  _   _ _   _  ____ _____ ___  _   _ ____  _        _ __   _______ ____  ____    _  _
+|  _ \| | | | \ | |/ ___| ____/ _ \| \ | / ___|| |      / \\ \ / / ____|  _ \/ ___|  | || |
+| | | | | | |  \| | |  _|  _|| | | |  \| \___ \| |     / _ \\ V /|  _| | |_) \___ \  | || |_
+| |_| | |_| | |\  | |_| | |__| |_| | |\  |___) | |___ / ___ \| | | |___|  _ < ___) | |__   _|
+|____/ \___/|_| \_|\____|_____\___/|_| \_|____/|_____/_/   \_\_| |_____|_| \_\____/     |_|
 =============================================================================================`,
 
     /**
diff --git a/src/module/ds4.ts b/src/module/ds4.ts
index bd76905c..002e9314 100644
--- a/src/module/ds4.ts
+++ b/src/module/ds4.ts
@@ -18,8 +18,8 @@ Hooks.once("init", async function () {
     CONFIG.DS4 = DS4;
 
     // Define custom Entity classes
-    CONFIG.Actor.entityClass = DS4Actor as typeof Actor; // TODO: Can we remove the casts?
-    CONFIG.Item.entityClass = DS4Item as typeof Item; // TODO: Can we remove the casts?
+    CONFIG.Actor.entityClass = DS4Actor as typeof Actor;
+    CONFIG.Item.entityClass = DS4Item as typeof Item;
 
     // Register sheet application classes
     Actors.unregisterSheet("core", ActorSheet);
diff --git a/src/module/item/item-sheet.ts b/src/module/item/item-sheet.ts
index d9258449..f6e95420 100644
--- a/src/module/item/item-sheet.ts
+++ b/src/module/item/item-sheet.ts
@@ -1,4 +1,3 @@
-import { DS4ActorDataType } from "../actor/actor-data";
 import { DS4Item } from "./item";
 import { DS4ItemDataType } from "./item-data";
 
@@ -6,7 +5,7 @@ import { DS4ItemDataType } from "./item-data";
  * Extend the basic ItemSheet with some very simple modifications
  * @extends {ItemSheet}
  */
-export class DS4ItemSheet extends ItemSheet<DS4ActorDataType, DS4Item> {
+export class DS4ItemSheet extends ItemSheet<DS4ItemDataType, DS4Item> {
     /** @override */
     static get defaultOptions(): FormApplicationOptions {
         return mergeObject(super.defaultOptions, {
@@ -26,7 +25,7 @@ export class DS4ItemSheet extends ItemSheet<DS4ActorDataType, DS4Item> {
     /* -------------------------------------------- */
 
     /** @override */
-    getData(): ItemSheetData<DS4ItemDataType> {
+    getData(): ItemSheetData<DS4ItemDataType, DS4Item> {
         const data = { ...super.getData(), config: CONFIG.DS4 };
         console.log(data);
         return data;
@@ -35,11 +34,15 @@ export class DS4ItemSheet extends ItemSheet<DS4ActorDataType, DS4Item> {
     /* -------------------------------------------- */
 
     /** @override */
-    setPosition(options = {}): unknown {
+    setPosition(options: ApplicationPosition = {}): ApplicationPosition {
         const position = super.setPosition(options);
-        const sheetBody = (this.element as JQuery).find(".sheet-body"); // TODO: Why is the cast necessary?
-        const bodyHeight = position.height - 192;
-        sheetBody.css("height", bodyHeight);
+        if ("find" in this.element) {
+            const sheetBody = this.element.find(".sheet-body");
+            const bodyHeight = position.height - 192;
+            sheetBody.css("height", bodyHeight);
+        } else {
+            console.log("Failure setting position.");
+        }
         return position;
     }