diff --git a/src/Browser/Avalonia.Browser/webapp/modules/storage/storageItem.ts b/src/Browser/Avalonia.Browser/webapp/modules/storage/storageItem.ts
index 384a56f4aa..56833e448c 100644
--- a/src/Browser/Avalonia.Browser/webapp/modules/storage/storageItem.ts
+++ b/src/Browser/Avalonia.Browser/webapp/modules/storage/storageItem.ts
@@ -97,37 +97,37 @@ export class StorageItem {
         return (item.handle as any).entries();
     }
 
-    public static async createFile(item: StorageItem, name: string) : Promise<any | null> {
+    public static async createFile(item: StorageItem, name: string): Promise<any | null> {
         if (item.kind !== "directory" || !item.handle) {
             throw new TypeError("Unable to create item in the requested directory");
         }
 
         await item.verityPermissions("readwrite");
 
-        return await (item.handle as any).getFileHandle(name, { create: true });
+        return await ((item.handle as any).getFileHandle(name, { create: true }) as Promise<any>);
     }
 
-    public static async createFolder(item: StorageItem, name: string) : Promise<any | null> {
+    public static async createFolder(item: StorageItem, name: string): Promise<any | null> {
         if (item.kind !== "directory" || !item.handle) {
             throw new TypeError("Unable to create item in the requested directory");
         }
 
         await item.verityPermissions("readwrite");
 
-        return await (item.handle as any).getDirectoryHandle(name, { create: true });
+        return await ((item.handle as any).getDirectoryHandle(name, { create: true }) as Promise<any>);
     }
 
-    public static async deleteAsync(item: StorageItem) : Promise<any | null> {
+    public static async deleteAsync(item: StorageItem): Promise<any | null> {
         if (!item.handle) {
             return null;
         }
 
         await item.verityPermissions("readwrite");
 
-        return await (item.handle as any).remove({recursive: true});
+        return await ((item.handle as any).remove({ recursive: true }) as Promise<any>);
     }
 
-    public static async moveAsync(item: StorageItem, destination: StorageItem) : Promise<any | null> {
+    public static async moveAsync(item: StorageItem, destination: StorageItem): Promise<any | null> {
         if (!item.handle) {
             return null;
         }
@@ -137,7 +137,7 @@ export class StorageItem {
 
         await item.verityPermissions("readwrite");
 
-        return await (item.handle as any).move(destination /*, newName */);
+        return await ((item.handle as any).move(destination /*, newName */) as Promise<any>);
     }
 
     private async verityPermissions(mode: "read" | "readwrite"): Promise<void | never> {