diff --git a/src/endpoints/APIBaseWrapper.ts b/src/endpoints/APIBaseWrapper.ts
index 92a37c3..90b54a2 100644
--- a/src/endpoints/APIBaseWrapper.ts
+++ b/src/endpoints/APIBaseWrapper.ts
@@ -39,7 +39,7 @@ export default class APIBaseWrapper {
     this.onRequest('GET', path);
 
     return this.client
-      .get(path)
+      .get<T>(path)
       .then(({data}) => data)
       .then(handleResponseBody);
   }
@@ -47,19 +47,19 @@ export default class APIBaseWrapper {
   protected _wrapPost<T>(path: string, params = {}): Promise<T> {
     this.onRequest('POST', path, params);
 
-    return this.client.post(path, params).then(({data}) => data);
+    return this.client.post<T>(path, params).then(({data}) => data);
   }
 
   protected _wrapPatch<T>(path: string, params = {}): Promise<T> {
     this.onRequest('PATCH', path, params);
 
-    return this.client.patch(path, params).then(({data}) => data);
+    return this.client.patch<T>(path, params).then(({data}) => data);
   }
 
   protected _wrapDelete<T>(path: string): Promise<T> {
     this.onRequest('DELETE', path);
 
-    return this.client.delete(path).then(({data}) => data);
+    return this.client.delete<T>(path).then(({data}) => data);
   }
 
   /**
diff --git a/src/endpoints/ItemsWrapper.ts b/src/endpoints/ItemsWrapper.ts
index 7bb48d8..9798df6 100644
--- a/src/endpoints/ItemsWrapper.ts
+++ b/src/endpoints/ItemsWrapper.ts
@@ -1,5 +1,5 @@
 import APIBaseWrapper from './APIBaseWrapper';
-import type {ItemListPromise, ItemPromise} from '../types';
+import type {Item, ItemListPromise, ItemPromise} from '../types';
 
 export default class ItemsWrapper extends APIBaseWrapper {
   getAllItems(): ItemListPromise {
@@ -8,10 +8,10 @@ export default class ItemsWrapper extends APIBaseWrapper {
 
   getItem(itemId: number, detail: boolean = false): ItemPromise {
     const url = !detail ? `items/${itemId}` : `items/${itemId}?detail=true`;
-    return this._wrapGet(url);
+    return this._wrapGet<Item>(url);
   }
 
-  getItems(...itemIds: Array<number>): ItemListPromise {
+  getItems(itemIds: number[]): ItemListPromise {
     return this._wrapGet(`items/multi/${itemIds.join(',')}`);
   }
 
diff --git a/src/lib/handlers.ts b/src/lib/handlers.ts
index b4e76b2..b232796 100644
--- a/src/lib/handlers.ts
+++ b/src/lib/handlers.ts
@@ -1,11 +1,21 @@
-export function handleResponseBody(body: any) {
+/**
+ * Unwrap the response body from an AxiosResponse
+ *
+ * This function will return the `data` property of the response body if it exists,
+ * otherwise it will return the body itself.
+ *
+ * @param body
+ */
+export function handleResponseBody<T>(body: MaybeDataWrapped<T>): T | null {
   if (!body) {
     return null;
   }
 
-  if (!('data' in body)) {
+  if (typeof body !== 'object') {
     return body;
   }
 
-  return body.data;
+  return 'data' in body ? body.data : body;
 }
+
+type MaybeDataWrapped<T = unknown> = T | {data: T};